Your introduction paragraph has one job that matters more than the rest: it tells your reader what you are going to prove and why it is worth reading. Most strong introductions do that in three moves. A hook earns attention, background information gives the reader just enough context, and a thesis statement states your point. This guide shows you how to write each part, then walks through seven original introduction paragraph examples, from an argumentative essay to a college application essay, with every hook, background sentence and thesis labeled so you can see how they fit together.
An introduction paragraph moves your reader from a broad topic to your specific point. Picture a funnel: you open with something that makes the topic interesting, narrow to the context the reader needs, and finish with the sentence your whole essay will defend.
That last sentence matters most. The Purdue Online Writing Lab notes that the thesis statement usually appears at the end of the first paragraph, which is where most instructors look for it. If a reader finishes your introduction and cannot say what you are arguing or explaining, the paragraph has failed, however clever the opening line.
| Part | What It Does | Typical Length | Ask Yourself |
|---|---|---|---|
| Hook | Gives the reader a reason to keep going | 1 sentence | Could this sentence open only my essay, or any essay on the topic? |
| Background information | Supplies the facts, definitions or debate the reader needs to follow your thesis | 1 to 3 sentences | What does a smart reader outside my class need to know? |
| Thesis statement | States your claim, explanation or insight | 1 to 2 sentences | Could someone disagree with this, or does it only state a fact? |
| Roadmap (optional) | Previews the order of your main points | 1 sentence, or folded into the thesis | Is my paper long enough to need one? |
In a short essay, those parts usually add up to four to six sentences; in a research paper, they can stretch across several paragraphs. Some essay types bend the pattern. A narrative or college application essay often implies its thesis, and a research paper often replaces a catchy hook with a clearly defined problem.
The fastest way to write an introduction paragraph is to work backward: decide on your thesis first, then build the hook and background information that lead to it. You cannot pick a good opening line until you know where the paragraph is going.
Your thesis is the destination, so start there. Write one sentence that answers the assignment question and that someone could reasonably challenge, or, for an explanatory essay, that names the main point you will explain. It does not have to be perfect yet.
Compare these two versions:
The first version names a topic. The second takes a position and gives a reason, so the reader knows what the body paragraphs will do. For more help, see our guide on how to write a thesis statement.
Background information bridges the gap between your hook and your thesis. Ask what a smart reader outside your class needs to know to understand your claim. Usually that means one to three of these:
Leave out anything you will not use later, and save evidence and analysis for the body paragraphs. A fourth or fifth context sentence in a short essay usually means you have started the body early.
Pick a hook that is specific to your topic and matches the tone of the assignment. A precise statistic suits a policy argument, a vivid scene suits a personal narrative, and a puzzle in the text suits a literary analysis. The next section compares the options.
Read your hook and your thesis one after the other. If the jump feels abrupt, your background sentences need to do more work, because each sentence should narrow the focus a little more than the one before it. Words such as yet, however and because often mark the turn where context becomes your claim.
Come back to your introduction after you write the body and conclusion. Arguments shift as you write, and the University of North Carolina Writing Center suggests trying to write the introduction last for exactly that reason. Check that your thesis still matches what your body paragraphs prove, and cut any background you never used.
Then try UNC's reader test: ask a friend to read only your introduction and predict what the paper will discuss, what evidence it will use and what its tone will be. If they guess right, your introduction is working.
The best hook is one that could only open your essay. “Sleep is important” could start a thousand papers; a sentence about a 7:30 a.m. first bell and a sleepy sixteen-year-old could start only one. Each example below comes from the sample introductions later in this guide.
| Hook Type | Example | Works Best For | Watch Out For |
|---|---|---|---|
| Concrete scenario | “A 7:30 a.m. first bell asks a sixteen-year-old to solve equations…” | Argumentative essays | Keep it to one sentence that leads straight to your issue. |
| Cited statistic | “An estimated 23 percent of U.S. college students…” | Research papers | Give the source and year. An unsourced number looks invented. |
| Surprising fact | “The votes that formally choose the winner are cast in December…” | Expository essays | It must be accurate and genuinely surprising. |
| Scene | “I was nineteen the first time I admitted out loud that I could not swim.” | Narratives and college essays | Open in the moment, not with a life summary. |
| Puzzle | “The narrator… is not supposed to be writing the account we read.” | Literary analysis | Your thesis should resolve the puzzle. |
Questions and quotations need extra care. A question works only when the answer is not obvious, and a quotation works best when it comes from the text or person you are writing about, not a quote website. Some instructors discourage both in formal papers. For more openers, see our guide to writing a hook for an essay.
The seven introduction paragraph examples below are original samples written for this guide. Facts in them were checked against the sources listed under each one. Use them as models for structure, not as text to submit.
This introduction sets up a policy debate and takes a clear side.
A 7:30 a.m. first bell asks a sixteen-year-old to solve equations at an hour when many teenagers would naturally still be asleep. In 2014, the American Academy of Pediatrics recommended that middle and high schools start no earlier than 8:30 a.m., yet a CDC analysis of the 2011–12 school year found that only 17.7 percent of U.S. public middle and high schools started that late. In 2019, California became the first state to set a minimum start time, requiring most high schools to begin at 8:30 a.m. or later and middle schools at 8:00 a.m. or later. Other states should follow California’s lead, because later start times match the later sleep schedule that comes with puberty and give teenagers a realistic chance at the 8 to 10 hours of sleep the CDC recommends, which protects both their health and their schoolwork.
Why it works: Every sentence narrows the focus, and “yet” turns the background into a problem. See our guide on how to write an argumentative essay.
Facts checked against: CDC MMWR report on school start times, CDC sleep duration guidelines, California SB 328 bill text and KQED coverage of the law.
An expository thesis names what the essay will explain, not an opinion about it.
Every four years, Americans vote for president in November, but the votes that formally choose the winner are cast in December by 538 electors. Those electors make up the Electoral College, the system the Constitution uses to select the president. Each state receives one elector for each of its members in the House of Representatives plus two for its senators, and the District of Columbia receives three. Every state except Maine and Nebraska gives all of its electors to the candidate who wins its popular vote. Knowing how electors are allocated, how they cast their votes and why a candidate needs 270 of them explains how a candidate can win the presidency while losing the national popular vote, as happened in 2000 and 2016.
Why it works: It informs without arguing, and the thesis says exactly what will be explained.
Facts checked against: the National Archives Electoral College overview, the National Archives 2000 election results and the FEC Federal Elections 2016 report.
A narrative introduction opens inside a story, and its thesis is the insight the story will earn.
I was nineteen the first time I admitted out loud that I could not swim. My roommates had planned a weekend at a lake, and I had spent two weeks inventing reasons to stay in the cabin before the truth slipped out over pizza. The next Monday, I signed up for an adult beginner class at the campus pool, where I spent the entire first lesson gripping the wall in water that barely reached my chest. Learning to float in front of strangers taught me that embarrassment lasts a few minutes, while avoiding something can last for years.
Why it works: It starts in a specific moment. If your instructor wants the lesson saved for the end, close the introduction on the scene in the pool instead.
This introduction names both subjects and states what comparing them reveals.
In February 1791, President George Washington had a bank bill on his desk and two members of his cabinet telling him opposite things about it. The bill would create a national bank, an idea Treasury Secretary Alexander Hamilton had proposed to Congress in December 1790. Secretary of State Thomas Jefferson argued in a written opinion that the Constitution gave Congress no power to charter such a corporation, while Hamilton replied that the power was implied by the clause allowing Congress to make all laws “necessary and proper” for carrying out its listed powers. Both men claimed to be defending the Constitution, but they read it in opposite ways: Jefferson treated it as a strict limit on federal power, while Hamilton treated it as a grant of the means needed to reach national goals, a divide that still shapes arguments about federal power today.
Why it works: A weak thesis says two things are “similar and different.” This one names the difference. See our guide on how to write a compare and contrast essay.
Facts checked against: Federal Reserve History on the First Bank of the United States and the Founders Online editorial note on the bank bill opinions.
This introduction gives only the context its argument uses and ends with an interpretive claim.
The narrator of Charlotte Perkins Gilman’s “The Yellow Wall-Paper” is not supposed to be writing the account we read. Her husband, John, is a physician who insists she has nothing worse than a temporary nervous depression, and she has been forbidden to “work” until she recovers, so she writes in secret and puts the pages away when he comes in. Gilman published the story in The New England Magazine in January 1892, and in a 1913 essay she explained that a similar rest cure had nearly broken her and that she wrote the story to save other people from being driven crazy. Read with that history in mind, the story’s form becomes its argument: by making a forbidden journal the narrator’s only outlet, Gilman shows that the treatment meant to cure her is what drives her collapse.
Why it works: It avoids a plot-summary opening. Every detail sets up the claim about the journal form.
Facts checked against: Project Gutenberg text of the story, the National Library of Medicine exhibition on the story and Gilman’s 1913 essay in The American Yawp Reader.
A research introduction defines a problem with cited evidence. In a full paper it often runs several paragraphs; this one is compressed.
An estimated 23 percent of U.S. college students, about 3.8 million people, experienced food insecurity in 2020 (U.S. Government Accountability Office [GAO], 2024). The Supplemental Nutrition Assistance Program (SNAP) is the nation’s largest nutrition assistance program for low-income households, but college students face extra eligibility rules: those enrolled at least half-time generally qualify only if they meet an exemption, such as working at least 20 hours a week in paid employment or caring for a child under age 6 (U.S. Department of Agriculture, Food and Nutrition Service, 2025). Even among food-insecure students who appeared to meet those rules, an estimated 59 percent did not report receiving SNAP benefits (GAO, 2024). This paper examines why potentially eligible students go without benefits, focusing on three possible barriers: limited awareness of eligibility, the complexity of the student exemptions and stigma. It argues that colleges can narrow the gap by screening students for likely SNAP eligibility when they apply for financial aid.
Why it works: Every factual sentence carries a citation, and the thesis follows from the gap the evidence exposes. In APA Style, you do not label this section “Introduction”; the APA headings guidelines say the paper title at the top of the first page acts as the heading. See also our guide on how to write a research paper.
Facts checked against: GAO report GAO-24-107074 and USDA Food and Nutrition Service rules for students.
The Common App’s seven prompts are unchanged for 2026–27. This opening could answer prompt 5, about an event or realization that sparked personal growth.
Nobody in my family touched my grandmother’s rice cooker. It sat on the counter like a small white altar, and for sixteen years I watched her measure, rinse and season without writing anything down. Then, the summer before my junior year, she broke her wrist, pressed the measuring cup into my hand and said, “Now you learn.” I expected to learn a recipe. What I learned instead was how much of her history lived in her hands, and how little of it I had ever asked about.
Why it works: Admissions readers want your voice, not a five-paragraph thesis, and a short opening leaves room in the 650-word limit for the story. See our guide on how to write a college essay.
The hook, background and thesis pattern holds for almost every assignment, but the size of each part changes. Treat this table as a starting point and follow your rubric where it differs.
| Assignment | Background Focus | Thesis Form | Usual Size |
|---|---|---|---|
| Five-paragraph or timed essay | 1 to 2 sentences | Claim plus three reasons | 3 to 5 sentences |
| Argumentative essay | The debate and why it matters | A position someone could dispute | 4 to 6 sentences |
| Expository essay | Definitions and how it works | The main point you will explain | 4 to 6 sentences |
| Narrative essay | Only what the story needs | The lesson, stated lightly or implied | 1 short paragraph |
| Literary analysis | Author, title and relevant context | An interpretation you will prove | 4 to 6 sentences |
| Research paper | Prior research and the gap | Research question, purpose or argument | Often several paragraphs |
| College application essay | Woven into the story | Usually implied | Often 2 to 5 sentences |
One style question comes up often: can you say “I”? The APA first-person guidance calls for first person when you describe your own work, so “I examine” is fine in an APA paper. Many composition instructors still prefer third person, and their instructions win when they conflict.
The quickest way to improve a weak introduction is to cut every sentence that could open any essay, then replace the announcement with a real thesis. Here is a typical first draft:
Before: Since the beginning of time, education has been important to humans. According to the dictionary, a lecture is a talk given to an audience. There are many different opinions about recording lectures, and it is a very controversial topic. In this essay, I will discuss whether lectures should be recorded.
Work through it one sentence at a time:
After: Miss one lecture for a shift change or a fever, and you can spend the rest of the unit rebuilding it from a classmate’s notes. Some instructors post a recording of every class, while others ban recording to protect open discussion and student privacy. Colleges should require recordings in large lecture courses, with clear limits on how they are shared, because recordings help students who miss class for legitimate reasons, let every student review difficult material at their own pace and can be set up to protect privacy.
The revision is about the same length, but every sentence now works. The hook is specific, the background states both sides, and the thesis sets the body’s order: missed classes, review, then privacy.
Most weak introductions fail in one of five ways, each named in the UNC Writing Center handout on introductions. The fix is usually a cut, not more words.
| Mistake | What It Looks Like | How to Fix It |
|---|---|---|
| Placeholder | Vague filler such as “This topic has many aspects.” | Replace it with a specific fact, name or claim. |
| Restated question | The prompt reworded and nothing else | Answer the question in your thesis. |
| Webster’s Dictionary | “The dictionary defines…” | Define a term only if you use it in a specific way. |
| “Dawn of man” | “Since the beginning of time…” | Start at the level of your topic: one policy, one text, one decade. |
| Book report | Title, author and plot summary with no claim | Keep only what your thesis needs and end with an interpretation. |
Watch for three more problems that cost points:
Use this introduction paragraph template for a fast first draft, then revise until it no longer sounds like a template:
[Hook: one specific fact, scene, question or tension about your topic.] [Background: the event, definition or debate your reader needs.] [Background: the problem, gap or turn that makes your thesis necessary.] [Thesis: your claim, explanation or insight, plus the two or three reasons or points you will develop.]
Before you submit, check your introduction against this list:
Once your introduction is solid, your conclusion should answer it. Our guide on how to start a conclusion paragraph shows how to echo your thesis without repeating it word for word.
If you have drafted an introduction and want a second opinion, you can get feedback from a writing tutor on your own draft, with notes on where your hook, background or thesis needs tightening.
In a short college essay, an introduction paragraph is usually four to six sentences: one for the hook, one to three for background information and one or two for the thesis statement. A five-paragraph essay may need only three to five sentences. Longer research papers can use several paragraphs. A useful check is proportion: if your introduction is longer than any of your body paragraphs, it probably includes evidence or analysis that belongs later.
The three parts are the hook, the background information and the thesis statement. The hook earns the reader’s attention, the background gives the context needed to understand your point, and the thesis states the claim, explanation or insight the essay will develop. Longer papers sometimes add a fourth part, a roadmap sentence that previews the order of the main sections.
Write a rough working thesis first, but write or rewrite the full introduction last. Your argument often changes as you draft the body, and the UNC Writing Center recommends trying to write the introduction at the end for that reason. A quick placeholder introduction helps you start; just make sure you revise it so the thesis matches what your essay actually argues.
Yes, if the question is specific and not easy to answer. “Why would a doctor forbid his patient to write?” creates a real puzzle your essay can solve. “Have you ever been tired?” does not, because every reader already knows the answer. Some instructors discourage rhetorical questions in formal papers, so check your rubric. When in doubt, turn the question into a statement of the puzzle.
It depends on the assignment and the style guide. APA Style calls for first person when you describe your own work, such as “I examine three barriers.” Narrative and college application essays are written in first person by design. Many composition instructors still prefer third person for argumentative and analytical essays, so follow your instructor’s guidelines when they differ from a style guide.
Almost every academic essay needs one, usually at the end of the introduction. The main exceptions are personal narratives and college application essays, where the insight is often implied and fully revealed later in the essay. Research papers may state a research question, purpose or hypothesis instead of a single claim. If you are unsure whether your assignment needs one, ask, or include a clear thesis to be safe.
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