Purdue Online Writing Lab Purdue OWL® College of Liberal Arts

Expository Essays

OWL logo

Welcome to the Purdue OWL

This page is brought to you by the OWL at Purdue University. When printing this page, you must include the entire legal notice.

Copyright ©1995-2018 by The Writing Lab & The OWL at Purdue and Purdue University. All rights reserved. This material may not be published, reproduced, broadcast, rewritten, or redistributed without permission. Use of this site constitutes acceptance of our terms and conditions of fair use.

The Modes of Discourse—Exposition, Description, Narration, Argumentation (EDNA)—are common paper assignments you may encounter in your writing classes. Although these genres have been criticized by some composition scholars, the Purdue OWL recognizes the wide spread use of these approaches and students’ need to understand and produce them.

What is an expository essay?

The expository essay is a genre of essay that requires the student to investigate an idea, evaluate evidence, expound on the idea, and set forth an argument concerning that idea in a clear and concise manner. This can be accomplished through comparison and contrast, definition, example, the analysis of cause and effect, etc.

Please note : This genre is commonly assigned as a tool for classroom evaluation and is often found in various exam formats.

The structure of the expository essay is held together by the following.

  • A clear, concise, and defined thesis statement that occurs in the first paragraph of the essay.

It is essential that this thesis statement be appropriately narrowed to follow the guidelines set forth in the assignment. If the student does not master this portion of the essay, it will be quite difficult to compose an effective or persuasive essay.

  • Clear and logical transitions between the introduction, body, and conclusion.

Transitions are the mortar that holds the foundation of the essay together. Without logical progression of thought, the reader is unable to follow the essay’s argument, and the structure will collapse.

  • Body paragraphs that include evidential support.

Each paragraph should be limited to the exposition of one general idea. This will allow for clarity and direction throughout the essay. What is more, such conciseness creates an ease of readability for one’s audience. It is important to note that each paragraph in the body of the essay must have some logical connection to the thesis statement in the opening paragraph.

  • Evidential support (whether factual, logical, statistical, or anecdotal).

Often times, students are required to write expository essays with little or no preparation; therefore, such essays do not typically allow for a great deal of statistical or factual evidence.

  • A bit of creativity!

Though creativity and artfulness are not always associated with essay writing, it is an art form nonetheless. Try not to get stuck on the formulaic nature of expository writing at the expense of writing something interesting. Remember, though you may not be crafting the next great novel, you are attempting to leave a lasting impression on the people evaluating your essay.

  • A conclusion that does not simply restate the thesis, but readdresses it in light of the evidence provided.

It is at this point of the essay that students will inevitably begin to struggle. This is the portion of the essay that will leave the most immediate impression on the mind of the reader. Therefore, it must be effective and logical. Do not introduce any new information into the conclusion; rather, synthesize and come to a conclusion concerning the information presented in the body of the essay.

A complete argument

Perhaps it is helpful to think of an essay in terms of a conversation or debate with a classmate. If I were to discuss the cause of the Great Depression and its current effect on those who lived through the tumultuous time, there would be a beginning, middle, and end to the conversation. In fact, if I were to end the exposition in the middle of my second point, questions would arise concerning the current effects on those who lived through the Depression. Therefore, the expository essay must be complete, and logically so, leaving no doubt as to its intent or argument.

The five-paragraph Essay

A common method for writing an expository essay is the five-paragraph approach. This is, however, by no means the only formula for writing such essays. If it sounds straightforward, that is because it is; in fact, the method consists of:

  • an introductory paragraph
  • three evidentiary body paragraphs
  • a conclusion
  • PRO Courses Guides New Tech Help Pro Expert Videos About wikiHow Pro Upgrade Sign In
  • EDIT Edit this Article
  • EXPLORE Tech Help Pro About Us Random Article Quizzes Request a New Article Community Dashboard This Or That Game Popular Categories Arts and Entertainment Artwork Books Movies Computers and Electronics Computers Phone Skills Technology Hacks Health Men's Health Mental Health Women's Health Relationships Dating Love Relationship Issues Hobbies and Crafts Crafts Drawing Games Education & Communication Communication Skills Personal Development Studying Personal Care and Style Fashion Hair Care Personal Hygiene Youth Personal Care School Stuff Dating All Categories Arts and Entertainment Finance and Business Home and Garden Relationship Quizzes Cars & Other Vehicles Food and Entertaining Personal Care and Style Sports and Fitness Computers and Electronics Health Pets and Animals Travel Education & Communication Hobbies and Crafts Philosophy and Religion Work World Family Life Holidays and Traditions Relationships Youth
  • Browse Articles
  • Learn Something New
  • Quizzes Hot
  • This Or That Game New
  • Train Your Brain
  • Explore More
  • Support wikiHow
  • About wikiHow
  • Log in / Sign up
  • Education and Communications
  • College University and Postgraduate
  • Academic Writing

How to Write an Expository Essay

Last Updated: December 13, 2022 Fact Checked

This article was co-authored by Tristen Bonacci . Tristen Bonacci is a Licensed English Teacher with more than 20 years of experience. Tristen has taught in both the United States and overseas. She specializes in teaching in a secondary education environment and sharing wisdom with others, no matter the environment. Tristen holds a BA in English Literature from The University of Colorado and an MEd from The University of Phoenix. There are 10 references cited in this article, which can be found at the bottom of the page. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 564,766 times.

Expository essays are often assigned in academic settings. In an expository essay, you need to consider an idea, investigate the idea, then explain the idea. Some expository essays may include an argument, while others are purely informative. [1] X Trustworthy Source Purdue Online Writing Lab Trusted resource for writing and citation guidelines Go to source While it may seem overwhelming, writing an expository essay is easy if you take it one step at a time.

Sample Essay Conclusion

write an expository essay

Planning Your Essay

Step 1 Define your purpose for writing.

  • If you are writing an expository essay for an assignment, read the assignment guidelines. Ask your instructor if anything seems unclear.

Step 2 Consider your audience.

  • If you are writing your essay for a class assignment, consider what your instructor will expect you to include in your essay.

Step 3 Generate ideas for your expository essay.

  • Try listing. List all your ideas for your expository essay. Then look over the list you have made and group similar ideas together. Expand those lists by adding more ideas or by using another prewriting activity. [6] X Research source
  • Try freewriting. Write nonstop for about 10 minutes. Write whatever comes to mind and don’t edit yourself. After you finish writing, review what you have written. Highlight or underline the most useful information for your expository essay. Repeat the freewriting exercise using the passages you underlined as a starting point. You can repeat this exercise many times to continue to refine and develop your ideas. [7] X Research source
  • Try clustering. Write a brief explanation of the subject of your expository essay on the center of a piece of paper and circle it. Then draw three or more lines extending from the circle. Write a corresponding idea at the end of each of these lines. Continue developing your cluster until you have explored as many connections as you can. [8] X Research source
  • Try questioning. On a piece of paper, write out “Who? What? When? Where? Why? How?” Space the questions about two or three lines apart on the paper so that you can write your answers on these lines. Respond to each question in as much detail as you can. [9] X Research source

Step 4 Make an outline.

  • Trustworthy internet sources usually include academic institutions like universities or research labs, government websites, and non-profit organizations.

Step 6 Evaluate your sources to determine their credibility before you decide to use them.

  • Identify the author and his or her credentials. Think about what qualifies this person to write about their subject. If the source has no author or the author does not have adequate credentials, then this source may not be trustworthy.
  • Check for citations to see if this author has researched the topic well enough. If the author has provided few or no sources, then this source may not be trustworthy.
  • Look for bias. Think about whether or not this author has presented an objective, well-reasoned account of the topic. If the author seems to value a particular argument or slant that is not supported or only thinly supported by fact, then this source may not be trustworthy.
  • Consider the publication date to see if this source presents the most up to date information on the subject.
  • Cross-check some of the information in the source. If you are still concerned about a source, cross-check some of its information against a trustworthy source.

Step 7 Read your sources well.

  • Show when you have quoted a source word for word by putting it into quotation marks. Include information about the source such as the author’s name, article title or book title, and page number.
  • Write down the publishing information of each source. You will need this information for your "References," "Bibliography," or "Works Cited" pages. Format this page according to your instructor's guidelines.

Step 9 Develop your tentative thesis.

  • Make sure your thesis is arguable. Do not state facts or matters of taste. For example, "George Washington was the first president of the United States," is not a good thesis because it states a fact. Likewise, "Die Hard is a great movie," is not a good thesis because it expresses a matter of taste. [16] X Trustworthy Source University of North Carolina Writing Center UNC's on-campus and online instructional service that provides assistance to students, faculty, and others during the writing process Go to source
  • Make sure your thesis provides enough detail. In other words, avoid just saying that something is "good" or "effective." Instead, say what makes something "good" or "effective. [17] X Trustworthy Source University of North Carolina Writing Center UNC's on-campus and online instructional service that provides assistance to students, faculty, and others during the writing process Go to source

Introducing Your Essay

Step 1 Begin with an engaging sentence that gets right into your topic.

  • An engaging hook can take many forms. You could start with an anecdote, an informative and attention-grabbing quote, a bold opinion statement, or anything that will make your readers want to continue with your essay.

Step 2 Provide context.

  • If you are writing about a book, provide the name of the work, the author, and a brief summary of the plot.
  • If you are writing about a specific day in history, summarize the day's events. Then, explain how it fits into a broader historical scope.
  • If you are writing about a person, name the person and provide a brief biography.
  • Keep in mind that your context should lead up to your thesis statement. Explain everything your reader needs to know to understand what your topic is about. Then narrow it down until you reach the topic itself.

Step 3 Provide your thesis statement.

Expressing Your Main Points

Step 1 Determine how many paragraphs to include.

  • A five-paragraph essay should include three body paragraphs. Each body paragraph should discuss a piece of supporting evidence that supports your thesis.
  • Even if your essay is longer than five paragraphs, the same principles still apply. Each paragraph should discuss a piece of supporting evidence.

Step 2 Begin each paragraph with a topic sentence.

  • "Dogs played an active role in Marine Corps missions in the Pacific."
  • "The Doberman Pinscher was the official dog of the US Marine Corps during WWII, but all breeds were eligible to train as war dogs."
  • "War dogs were even eligible to receive military awards for their service."

Step 3 Elaborate on your supporting evidence.

  • Most of your evidence should be in the form of cited quotes, paraphrases, and summaries from your research.
  • Your evidence could also come from interviews, anecdotes, or personal experience.
  • Try to provide at least two to three pieces of evidence to support each of your claims.
  • For example, if a paragraph starts with, "War dogs were even eligible to receive military awards for their service," the supporting evidence might be a list of dogs who got awards and the awards they were given.

Step 4 Analyze the significance of each piece of evidence.

  • You could write, "Even though Dobermans were the most common breed used in WWII, they were not the only breed, and were not the only dogs recognized for their help."

Concluding Your Essay

Step 1 Restate and rephrase your thesis.

  • Note that the second sentence repeats the information provided in your original thesis. It just says it in a new way while also hinting at the information you included in the body of the essay.

Step 2 Summarize and review your main ideas.

  • Explain how the topic affects the reader
  • Explain how your narrow topic applies to a broader theme or observation
  • Call the reader to action or further exploration on the topic
  • Present new questions that your essay introduced

Expert Q&A

Tristen Bonacci

  • If you are unsure about anything as you work on your essay, talk to your instructor or meet with a writing tutor for help. Thanks Helpful 2 Not Helpful 0

write an expository essay

You Might Also Like

Write an Essay

  • ↑ https://owl.purdue.edu/owl/general_writing/academic_writing/essay_writing/expository_essays.html
  • ↑ https://www.grammarly.com/blog/expository-essay/
  • ↑ Tristen Bonacci. Licensed English Teacher. Expert Interview. 21 December 2021.
  • ↑ http://writing.ku.edu/prewriting-strategies
  • ↑ https://grammar.yourdictionary.com/grammar-rules-and-tips/tips-on-writing-an-excellent-expository-essay.html
  • ↑ http://www.writing.utoronto.ca/advice/reading-and-researching/notes-from-research
  • ↑ http://writingcenter.unc.edu/handouts/thesis-statements/
  • ↑ https://writingcenter.unc.edu/tips-and-tools/thesis-statements/
  • ↑ https://owl.purdue.edu/owl/research_and_citation/using_research/quoting_paraphrasing_and_summarizing/index.html
  • ↑ https://owl.purdue.edu/owl/general_writing/common_writing_assignments/argument_papers/conclusions.html

About This Article

Tristen Bonacci

Before you write an expository essay, take some time to jot down ideas for your essay. Try the clustering method by writing a brief explanation of your subject in a bubble in the center of your page. Then, draw 3 or more lines extending from the circle and jot down idea bubbles that connect to your main theme. Once you have a plan for your expository essay, write out an outline to organize what you’re going to say. Make sure to begin your outline with an engaging introduction sentence. After the introduction sentence, provide some background information and include your thesis statement, which is your main argument. If you’re writing a 5 paragraph essay, you should include 3 body paragraphs after your introduction then a conclusion paragraph that summarizes your main points. However you organize your essay, make sure to include credible sources for important information, like statistics, so your teacher knows that it’s accurate. To learn how to use transitions in your essay, read more from our Writing co-author. Did this summary help you? Yes No

  • Send fan mail to authors

Reader Success Stories

Freida Ghabiliha

Freida Ghabiliha

Nov 24, 2017

Did this article help you?

write an expository essay

Qutaiba Raid

Jan 31, 2018

Maryanne Waqa

Maryanne Waqa

Aug 23, 2018

Anonymous

Apr 9, 2018

Anonymous

Nov 25, 2017

Am I a Narcissist or an Empath Quiz

Featured Articles

How to Perform a Candle Wax Reading

Trending Articles

View an Eclipse

Watch Articles

Make Sticky Rice Using Regular Rice

  • Terms of Use
  • Privacy Policy
  • Do Not Sell or Share My Info
  • Not Selling Info

wikiHow Tech Help Pro:

Level up your tech skills and stay ahead of the curve

IMAGES

  1. Expository Essay: Examples and Tips of a Proper Writing That Will Be

    write an expository essay

  2. How To Write An Expository Essay in 6 Steps

    write an expository essay

  3. How To Write An Expository Essay (7 Best Tips)

    write an expository essay

  4. How to Write an Expository Essay: Examples and 25 Topic Ideas

    write an expository essay

  5. What Is an Expository Essay? Examples and Guide

    write an expository essay

  6. How to Write an Expository Essay

    write an expository essay

VIDEO

  1. How to write expository writing essay. briefly explain in urdu / Hindi. #education #pakistan #india

  2. Why Expository Essays?!

  3. How To Write Personal Expository Essays (Body Paragraphs)

  4. Expository Essay Literary Term #literary term #expository #essay

  5. How to write an Expository paragraph

  6. What is Expository Writing? With Examples