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It’s the roadmap to your essay, it’s the forecast for your argument, it’s...your introduction paragraph, and writing one can feel pretty intimidating. The introduction paragraph is a part of just about every kind of academic writing , from persuasive essays to research papers. But that doesn’t mean writing one is easy!

If trying to write an intro paragraph makes you feel like a Muggle trying to do magic, trust us: you aren’t alone. But there are some tips and tricks that can make the process easier—and that’s where we come in.

In this article, we’re going to explain how to write a captivating intro paragraph by covering the following info:  

• A discussion of what an introduction paragraph is and its purpose in an essay
• An overview of the most effective introduction paragraph format, with explanations of the three main parts of an intro paragraph
• An analysis of real intro paragraph examples, with a discussion of what works and what doesn’t
• A list of four top tips on how to write an introduction paragraph

Are you ready? Let’s begin!

What Is an Introduction Paragraph? 

An introduction paragraph is the first paragraph of an essay , paper, or other type of academic writing. Argumentative essays , book reports, research papers, and even personal  essays are common types of writing that require an introduction paragraph. Whether you’re writing a research paper for a science course or an argumentative essay for English class , you’re going to have to write an intro paragraph. 

So what’s the purpose of an intro paragraph? As a reader’s first impression of your essay, the intro paragraph should introduce the topic of your paper. 

Your introduction will also state any claims, questions, or issues that your paper will focus on. This is commonly known as your paper’s thesis . This condenses the overall point of your paper into one or two short sentences that your reader can come back and reference later.

But intro paragraphs need to do a bit more than just introduce your topic. An intro paragraph is also supposed to grab your reader’s attention. The intro paragraph is your chance to provide just enough info and intrigue to make your reader say, “Hey, this topic sounds interesting. I think I’ll keep reading this essay!” That can help your essay stand out from the crowd.

In most cases, an intro paragraph will be relatively short. A good intro will be clear, brief, purposeful, and focused. While there are some exceptions to this rule, it’s common for intro paragraphs to consist of three to five sentences . 

Effectively introducing your essay’s topic, purpose, and getting your reader invested in your essay sounds like a lot to ask from one little paragraph, huh? In the next section, we’ll demystify the intro paragraph format by breaking it down into its core parts . When you learn how to approach each part of an intro, writing one won’t seem so scary!

Once you figure out the three parts of an intro paragraph, writing one will be a piece of cake!

The 3 Main Parts of an Intro Paragraph

In general, an intro paragraph is going to have three main parts: a hook, context, and a thesis statement . Each of these pieces of the intro plays a key role in acquainting the reader with the topic and purpose of your essay. 

Below, we’ll explain how to start an introduction paragraph by writing an effective hook, providing context, and crafting a thesis statement. When you put these elements together, you’ll have an intro paragraph that does a great job of making a great first impression on your audience!

Intro Paragraph Part 1: The Hook

When it comes to how to start an introduction paragraph, o ne of the most common approaches is to start with something called a hook. 

What does hook mean here, though? Think of it this way: it’s like when you start a new Netflix series: you look up a few hours (and a few episodes) later and you say, “Whoa. I guess I must be hooked on this show!” 

That’s how the hook is supposed to work in an intro paragrap h: it should get your reader interested enough that they don’t want to press the proverbial “pause” button while they’re reading it . In other words, a hook is designed to grab your reader’s attention and keep them reading your essay! 

This means that the hook comes first in the intro paragraph format—it’ll be the opening sentence of your intro. 

It’s important to realize  that there are many different ways to write a good hook. But generally speaking, hooks must include these two things: what your topic is, and the angle you’re taking on that topic in your essay. 

One approach to writing a hook that works is starting with a general, but interesting, statement on your topic. In this type of hook, you’re trying to provide a broad introduction to your topic and your angle on the topic in an engaging way . 

For example, if you’re writing an essay about the role of the government in the American healthcare system, your hook might look something like this: 

There's a growing movement to require that the federal government provide affordable, effective healthcare for all Americans. 

This hook introduces the essay topic in a broad way (government and healthcare) by presenting a general statement on the topic. But the assumption presented in the hook can also be seen as controversial, which gets readers interested in learning more about what the writer—and the essay—has to say.

In other words, the statement above fulfills the goals of a good hook: it’s intriguing and provides a general introduction to the essay topic.

Intro Paragraph Part 2: Context

Once you’ve provided an attention-grabbing hook, you’ll want to give more context about your essay topic. Context refers to additional details that reveal the specific focus of your paper. So, whereas the hook provides a general introduction to your topic, context starts helping readers understand what exactly you’re going to be writing about

You can include anywhere from one to several sentences of context in your intro, depending on your teacher’s expectations, the length of your paper, and complexity of your topic. In these context-providing sentences, you want to begin narrowing the focus of your intro. You can do this by describing a specific issue or question about your topic that you’ll address in your essay. It also helps readers start to understand why the topic you’re writing about matters and why they should read about it. 

So, what counts as context for an intro paragraph? Context can be any important details or descriptions that provide background on existing perspectives, common cultural attitudes, or a specific situation or controversy relating to your essay topic. The context you include should acquaint your reader with the issues, questions, or events that motivated you to write an essay on your topic...and that your reader should know in order to understand your thesis. 

For instance, if you’re writing an essay analyzing the consequences of sexism in Hollywood, the context you include after your hook might make reference to the #metoo and #timesup movements that have generated public support for victims of sexual harassment. 

The key takeaway here is that context establishes why you’re addressing your topic and what makes it important. It also sets you up for success on the final piece of an intro paragraph: the thesis statement.

Elle Woods' statement offers a specific point of view on the topic of murder...which means it could serve as a pretty decent thesis statement!

Intro Paragraph Part 3: The Thesis

The final key part of how to write an intro paragraph is the thesis statement. The thesis statement is the backbone of your introduction: it conveys your argument or point of view on your topic in a clear, concise, and compelling way . The thesis is usually the last sentence of your intro paragraph. 

Whether it’s making a claim, outlining key points, or stating a hypothesis, your thesis statement will tell your reader exactly what idea(s) are going to be addressed in your essay. A good thesis statement will be clear, straightforward, and highlight the overall point you’re trying to make.

Some instructors also ask students to include an essay map as part of their thesis. An essay map is a section that outlines the major topics a paper will address. So for instance, say you’re writing a paper that argues for the importance of public transport in rural communities. Your thesis and essay map might look like this: 

Having public transport in rural communities helps people improve their economic situation by giving them reliable transportation to their job, reducing the amount of money they spend on gas, and providing new and unionized work .

The underlined section is the essay map because it touches on the three big things the writer will talk about later. It literally maps out the rest of the essay!

So let’s review: Your thesis takes the idea you’ve introduced in your hook and context and wraps it up. Think of it like a television episode: the hook sets the scene by presenting a general statement and/or interesting idea that sucks you in. The context advances the plot by describing the topic in more detail and helping readers understand why the topic is important. And finally, the thesis statement provides the climax by telling the reader what you have to say about the topic. 

The thesis statement is the most important part of the intro. Without it, your reader won’t know what the purpose of your essay is! And for a piece of writing to be effective, it needs to have a clear purpose. Your thesis statement conveys that purpose , so it’s important to put careful thought into writing a clear and compelling thesis statement. 

How To Write an Introduction Paragraph: Example and Analysis

Now that we’ve provided an intro paragraph outline and have explained the three key parts of an intro paragraph, let’s take a look at an intro paragraph in action.

To show you how an intro paragraph works, we’ve included a sample introduction paragraph below, followed by an analysis of its strengths and weaknesses.

Example of Introduction Paragraph

While college students in the U.S. are struggling with how to pay for college, there is another surprising demographic that’s affected by the pressure to pay for college: families and parents. In the face of tuition price tags that total more than $100,000 (as a low estimate), families must make difficult decisions about how to save for their children’s college education. Charting a feasible path to saving for college is further complicated by the FAFSA’s estimates for an “Expected Family Contribution”—an amount of money that is rarely feasible for most American families. Due to these challenging financial circumstances and cultural pressure to give one’s children the best possible chance of success in adulthood, many families are going into serious debt to pay for their children’s college education. The U.S. government should move toward bearing more of the financial burden of college education. 

Example of Introduction Paragraph: Analysis

Before we dive into analyzing the strengths and weaknesses of this example intro paragraph, let’s establish the essay topic. The sample intro indicates that t he essay topic will focus on one specific issue: who should cover the cost of college education in the U.S., and why. Both the hook and the context help us identify the topic, while the thesis in the last sentence tells us why this topic matters to the writer—they think the U.S. Government needs to help finance college education. This is also the writer’s argument, which they’ll cover in the body of their essay. 

Now that we’ve identified the essay topic presented in the sample intro, let’s dig into some analysis. To pin down its strengths and weaknesses, we’re going to use the following three questions to guide our example of introduction paragraph analysis: 

• Does this intro provide an attention-grabbing opening sentence that conveys the essay topic? 
• Does this intro provide relevant, engaging context about the essay topic? 
• Does this intro provide a thesis statement that establishes the writer’s point of view on the topic and what specific aspects of the issue the essay will address? 

Now, let’s use the questions above to analyze the strengths and weaknesses of this sample intro paragraph. 

Does the Intro Have a Good Hook? 

First, the intro starts out with an attention-grabbing hook . The writer starts by presenting  an assumption (that the U.S. federal government bears most of the financial burden of college education), which makes the topic relatable to a wide audience of readers. Also note that the hook relates to the general topic of the essay, which is the high cost of college education. 

The hook then takes a surprising turn by presenting a counterclaim : that American families, rather than students, feel the true burden of paying for college. Some readers will have a strong emotional reaction to this provocative counterclaim, which will make them want to keep reading! As such, this intro provides an effective opening sentence that conveys the essay topic. 

Does the Intro Give Context?

T he second, third, and fourth sentences of the intro provide contextual details that reveal the specific focus of the writer’s paper . Remember: the context helps readers start to zoom in on what the paper will focus on, and what aspect of the general topic (college costs) will be discussed later on. 

The context in this intro reveals the intent and direction of the paper by explaining why the issue of families financing college is important. In other words, the context helps readers understand why this issue matters , and what aspects of this issue will be addressed in the paper.  

To provide effective context, the writer refers to issues (the exorbitant cost of college and high levels of family debt) that have received a lot of recent scholarly and media attention. These sentences of context also elaborate on the interesting perspective included in the hook: that American families are most affected by college costs.

Does the Intro Have a Thesis? 

Finally, this intro provides a thesis statement that conveys the writer’s point of view on the issue of financing college education. This writer believes that the U.S. government should do more to pay for students’ college educations. 

However, the thesis statement doesn’t give us any details about why the writer has made this claim or why this will help American families . There isn’t an essay map that helps readers understand what points the writer will make in the essay.

To revise this thesis statement so that it establishes the specific aspects of the topic that the essay will address, the writer could add the following to the beginning of the thesis statement:

The U.S. government should take on more of the financial burden of college education because other countries have shown this can improve education rates while reducing levels of familial poverty.

Check out the new section in bold. Not only does it clarify that the writer is talking about the pressure put on families, it touches on the big topics the writer will address in the paper: improving education rates and reduction of poverty. So not only do we have a clearer argumentative statement in this thesis, we also have an essay map!  

So, let’s recap our analysis. This sample intro paragraph does an effective job of providing an engaging hook and relatable, interesting context, but the thesis statement needs some work ! As you write your own intro paragraphs, you might consider using the questions above to evaluate and revise your work. Doing this will help ensure you’ve covered all of your bases and written an intro that your readers will find interesting!

4 Tips for How To Write an Introduction Paragraph

Now that we’ve gone over an example of introduction paragraph analysis, let’s talk about how to write an introduction paragraph of your own. Keep reading for four tips for writing a successful intro paragraph for any essay. 

Tip 1: Analyze Your Essay Prompt

If you’re having trouble with how to start an introduction paragraph, analyze your essay prompt! Most teachers give you some kind of assignment sheet, formal instructions, or prompt to set the expectations for an essay they’ve assigned, right? Those instructions can help guide you as you write your intro paragraph!

Because they’ll be reading and responding to your essay, you want to make sure you meet your teacher’s expectations for an intro paragraph . For instance, if they’ve provided specific instructions about how long the intro should be or where the thesis statement should be located, be sure to follow them!

The type of paper you’re writing can give you clues as to how to approach your intro as well. If you’re writing a research paper, your professor might expect you to provide a research question or state a hypothesis in your intro. If you’re writing an argumentative essay, you’ll need to make sure your intro overviews the context surrounding your argument and your thesis statement includes a clear, defensible claim. 

Using the parameters set out by your instructor and assignment sheet can put some easy-to-follow boundaries in place for things like your intro’s length, structure, and content. Following these guidelines can free you up to focus on other aspects of your intro... like coming up with an exciting hook and conveying your point of view on your topic!

Tip 2: Narrow Your Topic

You can’t write an intro paragraph without first identifying your topic. To make your intro as effective as possible, you need to define the parameters of your topic clearly—and you need to be specific. 

For example, let’s say you want to write about college football. “NCAA football” is too broad of a topic for a paper. There is a lot to talk about in terms of college football! It would be tough to write an intro paragraph that’s focused, purposeful, and engaging on this topic. In fact, if you did try to address this whole topic, you’d probably end up writing a book!

Instead, you should narrow broad topics to  identify a specific question, claim, or issue pertaining to some aspect of NCAA football for your intro to be effective. So, for instance, you could frame your topic as, “How can college professors better support NCAA football players in academics?” This focused topic pertaining to NCAA football would give you a more manageable angle to discuss in your paper.

So before you think about writing your intro, ask yourself: Is my essay topic specific, focused, and logical? Does it convey an issue or question that I can explore over the course of several pages? Once you’ve established a good topic, you’ll have the foundation you need to write an effective intro paragraph . 

Once you've figured out your topic, it's time to hit the books!

Tip 3: Do Your Research

This tip is tightly intertwined with the one above, and it’s crucial to writing a good intro: do your research! And, guess what? This tip applies to all papers—even ones that aren’t technically research papers. 

Here’s why you need to do some research: getting the lay of the land on what others have said about your topic—whether that’s scholars and researchers or the mass media— will help you narrow your topic, write an engaging hook, and provide relatable context. 

You don't want to sit down to write your intro without a solid understanding of the different perspectives on your topic. Whether those are the perspectives of experts or the general public, these points of view will help you write your intro in a way that is intriguing and compelling for your audience of readers. 

Tip 4: Write Multiple Drafts

Some say to write your intro first; others say write it last. The truth is, there isn’t a right or wrong time to write your intro—but you do need to have enough time to write multiple drafts . 

Oftentimes, your professor will ask you to write multiple drafts of your paper, which gives you a built-in way to make sure you revise your intro. Another approach you could take is to write out a rough draft of your intro before you begin writing your essay, then revise it multiple times as you draft out your paper. 

Here’s why this approach can work: as you write your paper, you’ll probably come up with new insights on your topic that you didn’t have right from the start. You can use these “light bulb” moments to reevaluate your intro and make revisions that keep it in line with your developing essay draft. 

Once you’ve written your entire essay, consider going back and revising your intro again . You can ask yourself these questions as you evaluate your intro: 

• Is my hook still relevant to the way I’ve approached the topic in my essay?
• Do I provide enough appropriate context to introduce my essay? 
• Now that my essay is written, does my thesis statement still accurately reflect the point of view that I present in my essay?

Using these questions as a guide and putting your intro through multiple revisions will help ensure that you’ve written the best intro for the final draft of your essay. Also, revising your writing is always a good thing to do—and this applies to your intro, too!

What's Next?

Your college essays also need great intro paragraphs. Here’s a guide that focuses on how to write the perfect intro for your admissions essays. 

Of course, the intro is just one part of your college essay . This article will teach you how to write a college essay that makes admissions counselors sit up and take notice.

Are you trying to write an analytical essay? Our step-by-step guide can help you knock it out of the park.

Ashley Sufflé Robinson has a Ph.D. in 19th Century English Literature. As a content writer for PrepScholar, Ashley is passionate about giving college-bound students the in-depth information they need to get into the school of their dreams.

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How to write a good thesis introduction

1. Identify your readership

2. hook the reader and grab their attention, 3. provide relevant background, 4. give the reader a sense of what the paper is about, 5. preview key points and lead into your thesis statement, frequently asked questions about writing a good thesis introduction, related articles.

Many people struggle to write a thesis introduction. Much of your research prep should be done and you should be ready to start your introduction. But often, it’s not clear what needs to be included in a thesis introduction. If you feel stuck at this point not knowing how to start, this guide can help.

Tip: If you’re really struggling to write your thesis intro, consider putting in a placeholder until you write more of the body of your thesis. Then, come back to your intro once you have a stronger sense of the overall content of your thesis.

A good introduction draws readers in while providing the setup for the entire project. There is no single way to write an introduction that will always work for every topic , but the points below can act as a guide. These points can help you write a good thesis introduction.

Before even starting with your first sentence, consider who your readers are. Most likely, your readers will be the professors who are advising you on your thesis.

You should also consider readers of your thesis who are not specialists in your field. Writing with them in your mind will help you to be as clear as possible; this will make your thesis more understandable and enjoyable overall.

Tip: Always strive to be clear, correct, concrete, and concise in your writing.

The first sentence of the thesis is crucial. Looking back at your own research, think about how other writers may have hooked you.

It is common to start with a question or quotation, but these types of hooks are often overused. The best way to start your introduction is with a sentence that is broad and interesting and that seamlessly transitions into your argument.

Once again, consider your audience and how much background information they need to understand your approach. You can start by making a list of what is interesting about your topic:

• Are there any current events or controversies associated with your topic that might be interesting for your introduction?
• What kinds of background information might be useful for a reader to understand right away?
• Are there historical anecdotes or other situations that uniquely illustrate an important aspect of your argument?

A good introduction also needs to contain enough background information to allow the reader to understand the thesis statement and arguments. The amount of background information required will depend on the topic .

There should be enough background information so you don't have to spend too much time with it in the body of the thesis, but not so much that it becomes uninteresting.

Tip: Strike a balance between background information that is too broad or too specific.

Let the reader know what the purpose of the study is. Make sure to include the following points:

• Briefly describe the motivation behind your research.
• Describe the topic and scope of your research.
• Explain the practical relevance of your research.
• Explain the scholarly consensus related to your topic: briefly explain the most important articles and how they are related to your research.

At the end of your introduction, you should lead into your thesis statement by briefly bringing up a few of your main supporting details and by previewing what will be covered in the main part of the thesis. You’ll want to highlight the overall structure of your thesis so that readers will have a sense of what they will encounter as they read.

A good introduction draws readers in while providing the setup for the entire project. There is no single way to write an introduction that will always work for every topic, but these tips will help you write a great introduction:

• Identify your readership.
• Grab the reader's attention.
• Provide relevant background.
• Preview key points and lead into the thesis statement.

A good introduction needs to contain enough background information, and let the reader know what the purpose of the study is. Make sure to include the following points:

• Briefly describe the motivation for your research.

The length of the introduction will depend on the length of the whole thesis. Usually, an introduction makes up roughly 10 per cent of the total word count.

The best way to start your introduction is with a sentence that is broad and interesting and that seamlessly transitions into your argument. Consider the audience, then think of something that would grab their attention.

In Open Access: Theses and Dissertations you can find thousands of recent works. Take a look at any of the theses or dissertations for real-life examples of introductions that were already approved.

Thesis Statements

What this handout is about.

This handout describes what a thesis statement is, how thesis statements work in your writing, and how you can craft or refine one for your draft.

Introduction

Writing in college often takes the form of persuasion—convincing others that you have an interesting, logical point of view on the subject you are studying. Persuasion is a skill you practice regularly in your daily life. You persuade your roommate to clean up, your parents to let you borrow the car, your friend to vote for your favorite candidate or policy. In college, course assignments often ask you to make a persuasive case in writing. You are asked to convince your reader of your point of view. This form of persuasion, often called academic argument, follows a predictable pattern in writing. After a brief introduction of your topic, you state your point of view on the topic directly and often in one sentence. This sentence is the thesis statement, and it serves as a summary of the argument you’ll make in the rest of your paper.

What is a thesis statement?

A thesis statement:

• tells the reader how you will interpret the significance of the subject matter under discussion.
• is a road map for the paper; in other words, it tells the reader what to expect from the rest of the paper.
• directly answers the question asked of you. A thesis is an interpretation of a question or subject, not the subject itself. The subject, or topic, of an essay might be World War II or Moby Dick; a thesis must then offer a way to understand the war or the novel.
• makes a claim that others might dispute.
• is usually a single sentence near the beginning of your paper (most often, at the end of the first paragraph) that presents your argument to the reader. The rest of the paper, the body of the essay, gathers and organizes evidence that will persuade the reader of the logic of your interpretation.

If your assignment asks you to take a position or develop a claim about a subject, you may need to convey that position or claim in a thesis statement near the beginning of your draft. The assignment may not explicitly state that you need a thesis statement because your instructor may assume you will include one. When in doubt, ask your instructor if the assignment requires a thesis statement. When an assignment asks you to analyze, to interpret, to compare and contrast, to demonstrate cause and effect, or to take a stand on an issue, it is likely that you are being asked to develop a thesis and to support it persuasively. (Check out our handout on understanding assignments for more information.)

How do I create a thesis?

A thesis is the result of a lengthy thinking process. Formulating a thesis is not the first thing you do after reading an essay assignment. Before you develop an argument on any topic, you have to collect and organize evidence, look for possible relationships between known facts (such as surprising contrasts or similarities), and think about the significance of these relationships. Once you do this thinking, you will probably have a “working thesis” that presents a basic or main idea and an argument that you think you can support with evidence. Both the argument and your thesis are likely to need adjustment along the way.

Writers use all kinds of techniques to stimulate their thinking and to help them clarify relationships or comprehend the broader significance of a topic and arrive at a thesis statement. For more ideas on how to get started, see our handout on brainstorming .

How do I know if my thesis is strong?

If there’s time, run it by your instructor or make an appointment at the Writing Center to get some feedback. Even if you do not have time to get advice elsewhere, you can do some thesis evaluation of your own. When reviewing your first draft and its working thesis, ask yourself the following :

• Do I answer the question? Re-reading the question prompt after constructing a working thesis can help you fix an argument that misses the focus of the question. If the prompt isn’t phrased as a question, try to rephrase it. For example, “Discuss the effect of X on Y” can be rephrased as “What is the effect of X on Y?”
• Have I taken a position that others might challenge or oppose? If your thesis simply states facts that no one would, or even could, disagree with, it’s possible that you are simply providing a summary, rather than making an argument.
• Is my thesis statement specific enough? Thesis statements that are too vague often do not have a strong argument. If your thesis contains words like “good” or “successful,” see if you could be more specific: why is something “good”; what specifically makes something “successful”?
• Does my thesis pass the “So what?” test? If a reader’s first response is likely to  be “So what?” then you need to clarify, to forge a relationship, or to connect to a larger issue.
• Does my essay support my thesis specifically and without wandering? If your thesis and the body of your essay do not seem to go together, one of them has to change. It’s okay to change your working thesis to reflect things you have figured out in the course of writing your paper. Remember, always reassess and revise your writing as necessary.
• Does my thesis pass the “how and why?” test? If a reader’s first response is “how?” or “why?” your thesis may be too open-ended and lack guidance for the reader. See what you can add to give the reader a better take on your position right from the beginning.

Suppose you are taking a course on contemporary communication, and the instructor hands out the following essay assignment: “Discuss the impact of social media on public awareness.” Looking back at your notes, you might start with this working thesis:

Social media impacts public awareness in both positive and negative ways.

You can use the questions above to help you revise this general statement into a stronger thesis.

• Do I answer the question? You can analyze this if you rephrase “discuss the impact” as “what is the impact?” This way, you can see that you’ve answered the question only very generally with the vague “positive and negative ways.”
• Have I taken a position that others might challenge or oppose? Not likely. Only people who maintain that social media has a solely positive or solely negative impact could disagree.
• Is my thesis statement specific enough? No. What are the positive effects? What are the negative effects?
• Does my thesis pass the “how and why?” test? No. Why are they positive? How are they positive? What are their causes? Why are they negative? How are they negative? What are their causes?
• Does my thesis pass the “So what?” test? No. Why should anyone care about the positive and/or negative impact of social media?

After thinking about your answers to these questions, you decide to focus on the one impact you feel strongly about and have strong evidence for:

Because not every voice on social media is reliable, people have become much more critical consumers of information, and thus, more informed voters.

This version is a much stronger thesis! It answers the question, takes a specific position that others can challenge, and it gives a sense of why it matters.

Let’s try another. Suppose your literature professor hands out the following assignment in a class on the American novel: Write an analysis of some aspect of Mark Twain’s novel Huckleberry Finn. “This will be easy,” you think. “I loved Huckleberry Finn!” You grab a pad of paper and write:

Mark Twain’s Huckleberry Finn is a great American novel.

You begin to analyze your thesis:

• Do I answer the question? No. The prompt asks you to analyze some aspect of the novel. Your working thesis is a statement of general appreciation for the entire novel.

Think about aspects of the novel that are important to its structure or meaning—for example, the role of storytelling, the contrasting scenes between the shore and the river, or the relationships between adults and children. Now you write:

In Huckleberry Finn, Mark Twain develops a contrast between life on the river and life on the shore.

• Do I answer the question? Yes!
• Have I taken a position that others might challenge or oppose? Not really. This contrast is well-known and accepted.
• Is my thesis statement specific enough? It’s getting there–you have highlighted an important aspect of the novel for investigation. However, it’s still not clear what your analysis will reveal.
• Does my thesis pass the “how and why?” test? Not yet. Compare scenes from the book and see what you discover. Free write, make lists, jot down Huck’s actions and reactions and anything else that seems interesting.
• Does my thesis pass the “So what?” test? What’s the point of this contrast? What does it signify?”

After examining the evidence and considering your own insights, you write:

Through its contrasting river and shore scenes, Twain’s Huckleberry Finn suggests that to find the true expression of American democratic ideals, one must leave “civilized” society and go back to nature.

This final thesis statement presents an interpretation of a literary work based on an analysis of its content. Of course, for the essay itself to be successful, you must now present evidence from the novel that will convince the reader of your interpretation.

Works consulted

We consulted these works while writing this handout. This is not a comprehensive list of resources on the handout’s topic, and we encourage you to do your own research to find additional publications. Please do not use this list as a model for the format of your own reference list, as it may not match the citation style you are using. For guidance on formatting citations, please see the UNC Libraries citation tutorial . We revise these tips periodically and welcome feedback.

Anson, Chris M., and Robert A. Schwegler. 2010. The Longman Handbook for Writers and Readers , 6th ed. New York: Longman.

Lunsford, Andrea A. 2015. The St. Martin’s Handbook , 8th ed. Boston: Bedford/St Martin’s.

Ramage, John D., John C. Bean, and June Johnson. 2018. The Allyn & Bacon Guide to Writing , 8th ed. New York: Pearson.

Ruszkiewicz, John J., Christy Friend, Daniel Seward, and Maxine Hairston. 2010. The Scott, Foresman Handbook for Writers , 9th ed. Boston: Pearson Education.

You may reproduce it for non-commercial use if you use the entire handout and attribute the source: The Writing Center, University of North Carolina at Chapel Hill

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Writing Center

Effective introductions and thesis statements, make them want to continue reading.

Writing an effective introduction is an art form. The introduction is the first thing that your reader sees. It is what invests the reader in your paper, and it should make them want to continue reading. You want to be creative and unique early on in your introduction; here are some strategies to help catch your reader’s attention:

• Tell a brief anecdote or story
• As a series of short rhetorical questions
• Use a powerful quotation
• Refute a common belief
• Cite a dramatic fact or statistic

Your introduction also needs to adequately explain the topic and organization of your paper.

Your  thesis statement  identifies the purpose of your paper. It also helps focus the reader on your central point. An effective thesis establishes a tone and a point of view for a given purpose and audience. Here are some important things to consider when constructing your thesis statement.

• Don’t just make a factual statement – your thesis is your educated opinion on a topic.
• Don’t write a highly opinionated statement that might offend your audience.
• Don’t simply make an announcement (ex. “Tuition should be lowered” is a much better thesis than “My essay will discuss if tuition should be lowered”).
• Don’t write a thesis that is too broad – be specific.

The thesis is often located in the middle or at the end of the introduction, but considerations about audience, purpose, and tone should always guide your decision about its placement.

Sometimes it’s helpful to wait to write the introduction until after you’ve written the essay’s body because, again, you want this to be one of the strongest parts of the paper.

Example of an introduction:

Innocent people murdered because of the hysteria of young girls! Many people believe that the young girls who accused citizens of Salem, Massachusetts of taking part in witchcraft were simply acting to punish their enemies. But recent evidence shows that the young girls may have been poisoned by a fungus called Ergot, which affects rye and wheat. The general public needs to learn about this possible cause for the hysteria that occurred in Salem so that society can better understand what happened in the past, how this event may change present opinion, and how the future might be changed by learning this new information.

By Rachel McCoppin, Ph.D. Last edited October 2016 by Allison Haas, M.A.

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Introduction, Thesis, and Conclusion: Writing Tips

• Introduction

Introductions should:

• Begin in an interesting way
• Start with a general idea about the topic and end with a specific statement about the focus of the paper (thesis statement). Use a funnel approach by starting broad and getting more narrow by the thesis.
• Have a thesis statement that begins with a claim or statement and exactly why you are writing about this claim or what you will be focusing about the claim (so what clause).

Introductions should not:

• Only be a sentence or two long. Introductions should be full paragraphs (5-6 sentences).
• Begin with the thesis statement. The thesis statement should be the last sentence (or two) of the introduction paragraph.
• Have wording like: “In this paper I will write about” or “I will focus on” be specific but do not spell out the obvious. (Remember to be interesting to the reader!)

Conclusions should:

• Begin in an interesting way that serves to begin to tie up the main points.
• Should have a summary of each main idea that the essay talks about.
• Show how these ideas relate to the thesis statement
• End in a way that comes full circle and ties up all loose ends

Conclusions should not:

• Begin with “In Conclusion”
• Introduce any new ideas
• End abruptly
• Leave the reader wondering how the main ideas relate to the thesis
• Only be a sentence or two long.  Conclusions should be full paragraphs.

Writing Scholarly Introductions - Group Session

Monday 3:00 p.m. 

The introduction to any type of writing is important as it sets the tone for the reader and builds their expectations for what is to come. Equally important is the conclusion since it is the last contact a writer has with the reader. Together, they form the bookends that encapsulate the argument made within the paper itself. In this interactive group session, you will learn how to create scholarly introductions and conclusions that will capture your reader’s interest and ensure that they leave knowing your intended points.  

Key Resource: Thesis Writing Tips

Thesis Writing Tips

Some ways to help strengthen your thesis are as follows:

• Before you develop an argument on any topic, you have to collect and organize evidence, look for possible relationships between known facts (such as surprising contrasts or similarities), and think about the significance of these relationships. Once you do this thinking, you will probably have a "working thesis," a basic or main idea, an argument that you think you can support with evidence but that may need adjustment along the way.
• Do I answer the question? Re-reading the question prompt after constructing a working thesis can help you fix an argument that misses the focus of the question.
• Have I taken a position that others might challenge or oppose? If your thesis simply states facts that no one would, or even could, disagree with, it's possible that you are simply providing a summary, rather than making an argument
• Is my thesis statement specific enough?   Thesis statements that are too vague often do not have a strong argument.  If your thesis contains words like "good" or "successful," see if you could be more specific: why is something "good"; what specifically makes something "successful"? Does my thesis pass the "So what?" test? If a reader's first response is, "So what?" then you need to clarify, to forge a relationship, or to connect to a larger issue.
• Does my essay support my thesis specifically and without wandering? If your thesis and the body of your essay do not seem to go together, one of them has to change. It's o.k. to change your working thesis to reflect things you have figured out in the course of writing your paper. Remember, always reassess and revise your writing as necessary.
• Does my thesis pass the "how and why?" test? If a reader's first response is "how?" or "why?" your thesis may be too open-ended and lack guidance for the reader. See what you can add to give the reader a better take on your position right from the beginning.
• Remember: A strong thesis statement takes a stand, justifies discussion, expresses one main idea and is specific. Use the questions above to help make sure each of these components are present in your thesis.

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Starting Your Research Paper: Writing an Introductory Paragraph

• Choosing Your Topic
• Define Keywords
• Planning Your Paper
• Writing an Introductory Paragraph

The Dreaded Introductory Paragraph

Writing the introductory paragraph can be a frustrating and slow process -- but it doesn't have to be.  If you planned your paper out, then most of the introductory paragraph is already written.  Now you just need a beginning and an end.

Here's an introductory paragraph for a paper I wrote.  I started the paper with a factoid, then presented each main point of my paper and then ended with my thesis statement.

  Breakdown:

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Gordon-Conwell Writing Center

• Understanding Writing Expectations
• Brainstorming and Writer's Block
• Outlining for Successful Writing

Writing a Strong Introduction

• Creating a Clear Thesis Statement
• Developing Body Paragraphs
• Connecting Ideas with Transitions
• Choosing the Best Sources
• Using Sources Effectively
• Avoiding Plagiarism
• Paraphrasing without Plagiarizing
• Addressing Counterarguments
• Ending with a Strong Conclusion
• Using Words Wisely
• Punctuating Correctly
• Revising, Editing, & Proofreading
• Applying Feedback
• Formatting Correctly
• Recorded Writing Workshops
• Return to GCTS Library Home Page

Just as we introduce ourselves when meeting new people for the first time, so must a writer introduce his/her topic. A writer must imagine that readers are at least somewhat unfamiliar with the topic. Furthermore, the writer should assume that readers are not necessarily interested in the topic. Therefore, it is a writer’s job to present the topic in a way that is intriguing and insightful. Failing to do so might mean that readers choose not to continue reading a text and/or that they read it without a proper understanding of what is being discussed.

Summarized Explanation

• Most multi-paragraph texts require an introductory paragraph. An introductory paragraph should include three main parts (hook, background information, thesis statement).

Detailed Explanation

Hypothetical Writing Prompt #1: Explain why introductory paragraphs should include a hook, background information, and thesis statement.

Color-coding key:

          Meeting someone for the first time without a proper introduction can be awkward. Likewise, a text without an introductory paragraph leaves a lot to be desired. The introduction is the first thing that readers see in a text. It should grab their attention and provide necessary context for the topic that will be discussed. It might also provide relevant research to present an overview of the topic. Additionally, an introduction must present the author's claim about the topic and the specific reasons that will be analyzed in the text. Thus, it serves some very important functions by engaging, informing, and guiding readers. To accomplish these goals, writers should begin texts with an introductory paragraph that includes an effective hook, background information, and thesis statement.

*The rest of the text would include three well-developed body paragraphs that address each key idea from the thesis statement:

• Why writers should include a hook in an introductory paragraph.
• Why writers should include background information in an introductory paragraph.
• Why writers should include a thesis statement in an introductory paragraph.

Hypothetical Writing Prompt #2: Explain whether the previous introductory paragraph is effective.

          They say that beauty is in the eye of the beholder. This adage is true, but not everything is relative. For example, in the world of writing, texts can take many forms, and writers have a lot of creative freedom. That said, there are some basic frameworks that should be employed for most writing forms—for instance, the tried-and-true template for an introductory paragraph. The classic template for an introduction typically begins by trying to increase the audience's interest in the topic. It then usually continues by offering relevant contextual information for the topic so that readers can have a foundation on which to build. And lastly, the introduction should ideally present the writer's main argument and key ideas that will be explored. Together, these three elements form a cohesive, comprehensive introduction.   Considering this, the previous introductory paragraph is quite effective because it includes a strong hook, background information, and thesis statement.

• Why the previous introductory paragraph includes a strong hook.
• Why the previous introductory paragraph includes strong background information.
• Why the previous introductory paragraph includes a strong thesis statement.
• Recorded Writing Workshops The writing workshops go into more detail regarding the topics presented in this writing guide.
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Tips and Examples for Writing Thesis Statements

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Tips for Writing Your Thesis Statement

1. Determine what kind of paper you are writing:

• An analytical paper breaks down an issue or an idea into its component parts, evaluates the issue or idea, and presents this breakdown and evaluation to the audience.
• An expository (explanatory) paper explains something to the audience.
• An argumentative paper makes a claim about a topic and justifies this claim with specific evidence. The claim could be an opinion, a policy proposal, an evaluation, a cause-and-effect statement, or an interpretation. The goal of the argumentative paper is to convince the audience that the claim is true based on the evidence provided.

If you are writing a text that does not fall under these three categories (e.g., a narrative), a thesis statement somewhere in the first paragraph could still be helpful to your reader.

2. Your thesis statement should be specific—it should cover only what you will discuss in your paper and should be supported with specific evidence.

3. The thesis statement usually appears at the end of the first paragraph of a paper.

4. Your topic may change as you write, so you may need to revise your thesis statement to reflect exactly what you have discussed in the paper.

Thesis Statement Examples

Example of an analytical thesis statement:

The paper that follows should:

• Explain the analysis of the college admission process
• Explain the challenge facing admissions counselors

Example of an expository (explanatory) thesis statement:

• Explain how students spend their time studying, attending class, and socializing with peers

Example of an argumentative thesis statement:

• Present an argument and give evidence to support the claim that students should pursue community projects before entering college

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How to Write a Strong Thesis Statement: 4 Steps + Examples

What’s Covered:

What is the purpose of a thesis statement, writing a good thesis statement: 4 steps, common pitfalls to avoid, where to get your essay edited for free.

When you set out to write an essay, there has to be some kind of point to it, right? Otherwise, your essay would just be a big jumble of word salad that makes absolutely no sense. An essay needs a central point that ties into everything else. That main point is called a thesis statement, and it’s the core of any essay or research paper.

You may hear about Master degree candidates writing a thesis, and that is an entire paper–not to be confused with the thesis statement, which is typically one sentence that contains your paper’s focus. 

Read on to learn more about thesis statements and how to write them. We’ve also included some solid examples for you to reference.

Typically the last sentence of your introductory paragraph, the thesis statement serves as the roadmap for your essay. When your reader gets to the thesis statement, they should have a clear outline of your main point, as well as the information you’ll be presenting in order to either prove or support your point. 

The thesis statement should not be confused for a topic sentence , which is the first sentence of every paragraph in your essay. If you need help writing topic sentences, numerous resources are available. Topic sentences should go along with your thesis statement, though.

Since the thesis statement is the most important sentence of your entire essay or paper, it’s imperative that you get this part right. Otherwise, your paper will not have a good flow and will seem disjointed. That’s why it’s vital not to rush through developing one. It’s a methodical process with steps that you need to follow in order to create the best thesis statement possible.

Step 1: Decide what kind of paper you’re writing

When you’re assigned an essay, there are several different types you may get. Argumentative essays are designed to get the reader to agree with you on a topic. Informative or expository essays present information to the reader. Analytical essays offer up a point and then expand on it by analyzing relevant information. Thesis statements can look and sound different based on the type of paper you’re writing. For example:

• Argumentative: The United States needs a viable third political party to decrease bipartisanship, increase options, and help reduce corruption in government.
• Informative: The Libertarian party has thrown off elections before by gaining enough support in states to get on the ballot and by taking away crucial votes from candidates.
• Analytical: An analysis of past presidential elections shows that while third party votes may have been the minority, they did affect the outcome of the elections in 2020, 2016, and beyond.

Step 2: Figure out what point you want to make

Once you know what type of paper you’re writing, you then need to figure out the point you want to make with your thesis statement, and subsequently, your paper. In other words, you need to decide to answer a question about something, such as:

• What impact did reality TV have on American society?
• How has the musical Hamilton affected perception of American history?
• Why do I want to major in [chosen major here]?

If you have an argumentative essay, then you will be writing about an opinion. To make it easier, you may want to choose an opinion that you feel passionate about so that you’re writing about something that interests you. For example, if you have an interest in preserving the environment, you may want to choose a topic that relates to that. 

If you’re writing your college essay and they ask why you want to attend that school, you may want to have a main point and back it up with information, something along the lines of:

“Attending Harvard University would benefit me both academically and professionally, as it would give me a strong knowledge base upon which to build my career, develop my network, and hopefully give me an advantage in my chosen field.”

Step 3: Determine what information you’ll use to back up your point

Once you have the point you want to make, you need to figure out how you plan to back it up throughout the rest of your essay. Without this information, it will be hard to either prove or argue the main point of your thesis statement. If you decide to write about the Hamilton example, you may decide to address any falsehoods that the writer put into the musical, such as:

“The musical Hamilton, while accurate in many ways, leaves out key parts of American history, presents a nationalist view of founding fathers, and downplays the racism of the times.”

Once you’ve written your initial working thesis statement, you’ll then need to get information to back that up. For example, the musical completely leaves out Benjamin Franklin, portrays the founding fathers in a nationalist way that is too complimentary, and shows Hamilton as a staunch abolitionist despite the fact that his family likely did own slaves. 

Step 4: Revise and refine your thesis statement before you start writing

Read through your thesis statement several times before you begin to compose your full essay. You need to make sure the statement is ironclad, since it is the foundation of the entire paper. Edit it or have a peer review it for you to make sure everything makes sense and that you feel like you can truly write a paper on the topic. Once you’ve done that, you can then begin writing your paper.

When writing a thesis statement, there are some common pitfalls you should avoid so that your paper can be as solid as possible. Make sure you always edit the thesis statement before you do anything else. You also want to ensure that the thesis statement is clear and concise. Don’t make your reader hunt for your point. Finally, put your thesis statement at the end of the first paragraph and have your introduction flow toward that statement. Your reader will expect to find your statement in its traditional spot.

If you’re having trouble getting started, or need some guidance on your essay, there are tools available that can help you. CollegeVine offers a free peer essay review tool where one of your peers can read through your essay and provide you with valuable feedback. Getting essay feedback from a peer can help you wow your instructor or college admissions officer with an impactful essay that effectively illustrates your point.

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60 Introductory Paragraph: Establishing Reader Interest and Writing a Strong Thesis

Ann Inoshita; Karyl Garland; Kate Sims; Jeanne K. Tsutsui Keuma; Tasha Williams; and Melissa Elston

Learning Objectives

• Learn the component parts of a complete and succinct introduction
• Examine strategies for the opening lines of an essay
• Learn how to write thesis sentences that are specific, precise, and confident
• Identify the differences between a strong thesis and a weak thesis

An introduction exists as the first paragraph in a five-page essay, and it serves the following purposes:

• Establishes reader interest.
• Introduces the general topic of the essay while establishing the writer’s voice, tone, or attitude, toward the subject.
• States the thesis that will be supported in the body paragraphs.

Establishing reader interest

Introductions should begin with an engaging lead or opener (sometimes called a “hook”) that is devised to evoke readers’ interest. Capturing readers’ attention motivates them to continue reading. Writers can garner a reader’s interest by doing the following:

• Beginning by quoting an expert on the respective topic or an inspirational individual.
• Beginning by offering some statistical evidence that is both informative and intriguing.
• Opening with a striking mental image.
• Appealing to the reader’s emotions.
• Raising a question or series of questions.
• Presenting an explanation or rationalization for the essay.
• Including a personal anecdote.
• Stating in the middle of a story with the conclusion of the story existing as the first sentence in the conclusion paragraph.

While the above strategies can be successful in “hooking” your reader, always confirm with your instructor whether or not you are using the right approach. For example, if your assignment sheet instructs you not to use first-person point-of-view, then including a personal anecdote in the introduction will not work for your paper.

Transition sentences

After the opener or hook, writers need to add transition sentences that should introduce the readers to the topic by stating general facts or ideas about the subject. These important sentences help readers move or “transition” from the hook toward the thesis statement.

You can think of your introduction as an inverted pyramid–whereas your first sentences about your topic are broad, the introductory paragraph then narrows down to the thesis, which should be specific.

A strong thesis statement

An introduction usually contains a thesis statement (i.e., the main point of the essay). A thesis statement is a promise to the reader about what the essay will be about. A thesis is not the topic itself, but rather the writer’s angle on the topic. For whatever topic a professor gives, writers must ask themselves, “What do I want to say about it?” Asking and then answering this question is vital to forming a thesis that is precise, forceful, and confident.

A thesis is usually one sentence long and appears toward the end of the introduction. It is specific and focuses on one to three points of a single idea—points that are able to be demonstrated in the body. It forecasts the content of the essay and suggests how the writer will organize the information. The templates in the section about composing thesis sentences all help writers develop specific, precise, and confident thesis sentences.

Specificity

A thesis statement must concentrate on a specific area of a general topic. The creation of a thesis statement begins when writers choose a broad subject and then narrow it down until they have pinpointed a specific aspect of that topic. For example, healthcare is a broad topic, but a proper thesis statement would focus on a specific area of that topic and essentially answer the following question: “What are the options for individuals without healthcare coverage?”

A strong thesis statement must be precise enough to allow for a coherent analysis of the topic but remain focused on the topic. If the specific topic pertains to options for individuals without healthcare coverage, then the precise thesis statement must make an exact, related, statement, such as the following: “Limited options exist for those who are uninsured by their employers.” To elaborate on this topic further, the writer might discuss how limited options impact the lives of the uninsured.

Writers must also be confident in their approach. Phrases such as “I feel” or “I believe” actually weaken the readers’ sense of confidence in what they are reading because these phrases imply that the writer may be the only person who feels this way.

Taking an authoritative stance on the matter persuades readers to have faith in the argument and to open their minds to the point of view of the writer. So, no thesis should contain phrases such as “in my opinion” or “I believe.” These statements reduce credibility.

Each of the following thesis statements meets several of the requirements: specificity, precision, and confidence.

Literature-based examples:

• The societal and personal struggles of Troy Maxon in the 1986 play Fences symbolize the challenges faced by black men who lived through segregation and integration in the United States, and their life stories can be considered as critical to understand the challenge black men continue to face over thirty years later.
• J. D. Salinger’s character in Catcher in the Rye , Holden Caulfield, is a confused and somewhat rebellious young person who voices his disgust with “phonies.” Yet, in an effort to protect himself, he acts like a phony on many occasions making him a complicated character within one of Salinger’s most celebrated novels.

Current events-based examples:

• Closing all American borders for a period of five years is one idea proposed so as to deal with illegal immigration; however, contemporary strategies regarding this issue do not address the essential human right for safety along with the essentials of food, clothing, and shelter.
• Discussing the dangers of illegal drug use is with elementary and middle school students is one method that schools use to help dissuade young people from abusing drugs as they grow up. However, children learn a great deal from what they observe making it imperative that parents monitor what their children watch on TV, see in movies, and glean from their friends and family members.

Avoid weak thesis statements

Here are some pitfalls to avoid when composing a thesis:

• A thesis is weak when it is simply a declaration of a subject or a description of what the writer will discuss in the essay. Remember, do not refer to your essay in your essay. By the time one enters college, such strategies for writing thesis statements have passed.
• A thesis is weak when the statement is too broad. Weak thesis statement: The life and presidency of Abraham Lincoln was challenging.

Adapted from English Composition: Connect, Collaborate, Communicate  by Ann Inoshita ; Karyl Garland; Kate Sims; Jeanne K. Tsutsui Keuma ; and Tasha Williams,  CC BY 4.0  

Introductory Paragraph: Establishing Reader Interest and Writing a Strong Thesis Copyright © by Ann Inoshita; Karyl Garland; Kate Sims; Jeanne K. Tsutsui Keuma; Tasha Williams; and Melissa Elston is licensed under a Creative Commons Attribution 4.0 International License , except where otherwise noted.

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How to Write a Good Introduction Section

A strong narrative is as integral a part of science writing as it is for any other form of communication..

Nathan Ni holds a PhD from Queens University. He is a science editor for The Scientist’s Creative Services Team who strives to better understand and communicate the relationships between health and disease.

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First impressions are important. Scientists need to make their work stand out among a sea of others. However, many mistakenly believe that first impressions are formed based only on titles and abstracts. In actuality, the introduction section is critical to making a real impression on the audience. The introduction is where authors outline their research topic and describe their study. It is where they provide background information and showcase their writing and argumentation styles. For these reasons, the introduction engages the audience in a deeper way than the formalities and rigidities of the title and abstract can afford. To use a fishing analogy: if the title and the abstract serve as the hook and the bait, then the introduction is the process of actually reeling the fish into the boat.

Good Introductions Are Important Guides

In contrast to the constraints placed on the title and abstract, the introduction is the first real opportunity for the scientist to engage with their audience and showcase and convey their passions and motivations for the study in question. This opportunity is somewhat of a double-edged sword. Study authors inevitably have a treasure trove of knowledge and expertise when it comes to their projects and their fields. However, they must remember that the audience does not necessarily have this background information—and that they are only engaging with their audience for a finite amount of time. Despite the urge to excitedly write about all of the different aspects and intricacies of the project, it is very important that authors keep their introductions simple and well organized. 

Therefore, the introduction should move from broad scopes to narrow focuses as the audience reads further. The author should direct the reader along this journey, focusing on topics with direct relevance to what was investigated in the study. A broad fact introduced early on should be linked or paired with a more specific fact along the same lines of thought, eventually culminating in how this information led to the motivation behind the study itself. It is vital to not go off on tangents or talk about things that are too esoteric. A confused audience is an audience that tends not to read further.

Applying Common Principles Across Well-Known and Niche Subjects

Writers can apply these principles in more specialized manuscripts focusing on a single entity rather than a well-known pathology. Consider the following example from a manuscript by cell biologist Luis R. Cruz-Vera’s research team from the University of Alabama in Huntsville, published in the Journal of Biological Chemistry. 1

Here, they divide the opening paragraph of their introduction into four distinct sections. First, they explain what ribosome arresting peptides (RAPs) are and what they do.

Ribosome arresting peptides (RAPs) are nascent polypeptides that act in cis on the translating ribosome to control the expression of genes by inducing ribosome arrest during translation elongation or termination. RAPs commonly sense external forces or low molecular weight compounds in the environment that spatially and temporally contribute to the expression of genes. 

Then they introduce the two different types of RAPs.

RAPs such as SecM that sense external forces on the ribosome are typically large, because these nascent peptides have a domain that functions outside of the ribosome. In contrast, those that sense small molecules inside of the ribosome, such as TnaC are smaller. 

They describe how each type works via a different mechanism.

Typically, larger RAPs interact with cellular factors that can control their capacity for arresting ribosomes. Because of their size and proximity to ribosomal components, large RAPs clearly show two structural domains, a sensor domain and an arresting domain. At the moment of the arrest for the large RAPs, the sensor domain is located outside the ribosome exit tunnel, whereas the arresting domain remains inside the tunnel. The short RAPs currently characterized interact with the compounds that they sense by using the ribosome exit tunnel as a binding surface. For these short RAPs, it has been determined that conserved amino acid residues are necessary to induce arrest by either directly binding the effector molecule or by acting at the peptidyl-transferase center (PTC) during ribosome arrest. 

And finally, they conclude by highlighting a knowledge gap in how small RAPs operate versus what is already known about large RAPs.

However, because the size of short RAPs ranges from only a few to a couple of dozen amino acids, as in the case of TnaC, it has remained unclear whether short RAPs are constituted by the two independent sensor and stalling domains, as it has been observed with larger RAPs.

In this way, the authors make a natural progression from “why this topic is important” to “what is known about this topic,” setting the stage for “what is unknown about this topic and why it should be studied.” 

Gradually Moving from Broad to Narrow

These principles can be further transferred towards the introductory section as a whole. The first paragraph should serve as an introduction to the field and the topic. The middle paragraph(s) provide exposition and detail regarding what is known and unknown, and what has already been done and still remains to do, and the final paragraph outlines the study and its principle findings, providing a transition into either the materials and methods or the results section. 

For example, this work by radiation oncologist Eric Deutsch’s group at Université Paris-Saclay, published in PLoS One , 2 opens by succinctly explaining a scientific problem: “ the threat of extensive dispersion of radioactive isotopes within populated areas that would have an unfortunate effect on human health has increased drastically .” It then offers the call to action necessitated by this problem: “ the development of a decorporating agent capable of effectively mitigating the effects of a wide range of isotopes is critical .”

In the next two paragraphs, the study authors provide information on how and why dispersion of radioactive isotopes are a problem—“ the FDA has approved only three compounds (only one of which is used as a preventative therapy) for the treatment of exposure to specific radioactive elements ”—and highlights the strengths and weaknesses of what is currently available. They then introduce the focal point of their own work, chitosan@DOTAGA, within this context, explaining its potential as a solution to the problem they previously introduced: “ After oral administration to rodents over several days, no signs of acute or chronic toxicity were observed, and DOTAGA did not enter the blood stream and was fully eliminated from the gastrointestinal tract within 24 hours of administration. ”

Finally, the introduction concludes by listing the study objective—“ explore the potential of this polymer for use in the decorporation of a wide range of radioactive isotopes ”—and the motivations and rationale behind the study objective—“ there are no suitable countermeasures available for uranium poisoning. […] This innovative approach aims to directly chelate the radioactive cations, specifically uranium, within the gastrointestinal tract prior to their systemic absorption, which ensures their prompt elimination and mitigation of the associated toxicities. ”

The Introduction Engages with the Reader

The introduction section is often overlooked in favor of the title and the abstract, but it serves two important functions. First, it gives the audience all of the information that it needs to contextualize the yet-to-be-presented data within the context of the problem that needs to be solved or the scientific question that needs to be addressed. Second, and more importantly, it justifies the importance of the study, of its initiative, rationale, and purpose. The introduction is the author’s best—and arguably only real—opportunity to convince the audience that their study is worth reading.  

Looking for more information on scientific writing? Check out  The Scientist’s   TS SciComm  section. Looking for some help putting together a manuscript, a figure, a poster, or anything else?    The Scientist’s   Scientific Services  may have the professional help that you need.

• Judd HNG, et al. Functional domains of a ribosome arresting peptide are affected by surrounding nonconserved residues . J Biol Chem . 2024;300(3):105780.
• Durand A, et al. Enhancing radioprotection: A chitosan-based chelating polymer is a versatile radioprotective agent for prophylactic and therapeutic interventions against radionuclide contamination . PLoS One . 2024;19(4):e0292414.

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