How to Write an Essay Introduction (With Hooks That Work)
The four moves every strong introduction makes, six hooks with real examples, how to tell a thesis from a statement of fact — and why you should write it second.
Most students write the introduction first and rewrite it last. That is the right instinct in the wrong order — and it is why so many essays open with "Since the dawn of time, humans have always…" The fix is a repeatable four-part structure and a hook that comes out of your actual argument instead of a quotation you found on a quotes website.
The four moves every strong introduction makes
An academic introduction narrows. It starts wide enough to give the reader bearings and ends on the single sentence your whole essay defends. Four moves, in order:
- The hook — one or two sentences that make the topic feel worth reading about. Specific, not grand.
- The context — two to four sentences of background the reader needs. What is the situation, the debate, the problem?
- The narrowing — one or two sentences moving from the general topic to your specific angle. Often where you name the tension or gap.
- The thesis — one sentence, usually the last, stating the claim your essay will prove.
How long should it be?
Roughly 8–10% of the essay. A 1,500-word essay gets 120–150 words — about one solid paragraph. A 5,000-word dissertation chapter gets several paragraphs but the same four moves. If your introduction is running past 15% of your word count, you are writing body paragraphs in the wrong place.
Six hooks that work, with examples
Skip the dictionary definition and the "since the beginning of time" opener. Markers have read thousands of both. These six actually earn attention:
1. The specific statistic
"In 2023, the average British teenager spent four hours and thirty-five minutes a day on a smartphone — more waking time than they spent in school."
Works because it is concrete and slightly surprising. Requires a real, citable source.
2. The contradiction
"Britain recycles more plastic than it did a decade ago, and sends more plastic to landfill than it did a decade ago. Both statements are true."
Sets up a puzzle the essay will resolve. Strongest hook for argumentative essays.
3. The concrete scene
"A nurse in a Manila emergency department begins her shift by writing patient observations on a paper chart, because the hospital's digital record system has been offline since March."
Grounds an abstract topic in something the reader can picture.
4. The stakes
"How a country classifies gig workers determines whether four million people receive sick pay."
Answers "why should I care" in one sentence.
5. The scholarly disagreement
"For Twenge (2019), the rise in adolescent anxiety is a smartphone story. For Orben and Przybylski (2019), the effect is smaller than the effect of eating potatoes."
Ideal for literature-heavy essays. Shows you know the field from the first line.
6. The common assumption, challenged
"Remote work is usually described as a pandemic innovation. It was in fact proposed, trialled and abandoned by American corporations three separate times before 2020."
Sets up a corrective argument. Needs evidence immediately after.
Hooks to avoid
- The dictionary definition. "Merriam-Webster defines democracy as…" Markers read this several times a week.
- The cosmic opener. "Throughout human history…" / "Since the dawn of time…" — says nothing and delays your point.
- The decorative quotation. A famous quote loosely related to your topic. If the quotation is not analysed later, cut it.
- The rhetorical question. "Have you ever wondered why…?" Weak in academic register, and the reader has not.
- The essay-map announcement. "This essay will first discuss X, then Y, then Z." Acceptable in some disciplines, but it is signposting, not a hook.
A worked example, start to finish
Prompt: Discuss the impact of remote learning on secondary school students.
Since the dawn of time, education has been an important part of society. In today's fast-paced world, technology has changed many things. The Cambridge Dictionary defines remote learning as learning that happens at a distance. This essay will explore the various impacts of remote learning on secondary school students, including both the positive and negative aspects.
Cosmic opener, filler phrase, dictionary definition, and a "thesis" that promises to discuss both sides without claiming anything.
When schools closed in March 2020, roughly 1.6 billion students moved online in under a month — the largest and least planned educational experiment on record. Four years of research has since produced a confusing picture: large average learning losses alongside a minority of students who performed better than they had in classrooms. That split is usually explained by access to devices and quiet space. This essay argues that the more decisive variable was pedagogical: outcomes tracked whether teachers redesigned assessment for an online setting, not whether students had good broadband.
Specific statistic, real context, a named tension, and a final sentence making a contestable claim the essay can defend.
Writing the thesis sentence
The thesis is the sentence your marker looks for first. It must be arguable — if nobody could reasonably disagree, it is a statement of fact, not a thesis.
| Not a thesis | Why | A thesis |
|---|---|---|
| Remote learning affected students in many ways. | Nobody disagrees; "many ways" commits to nothing | Remote learning widened attainment gaps primarily through assessment design rather than device access. |
| This essay will discuss social media and mental health. | Describes the essay instead of making a claim | The link between social media and adolescent anxiety is better explained by disrupted sleep than by social comparison. |
| Climate change is a serious problem. | True, but not contestable at this level | Carbon pricing has failed in the EU not because the mechanism is flawed but because free allocation undermined it. |
A useful test: write the strongest one-sentence case against your thesis. If you cannot, your thesis is not arguable yet — our guide to thesis statements works through the formulas for each essay type.
Research paper introductions are different
An essay introduction persuades. A research paper introduction — Chapter 1, or the opening section of a journal article — justifies. It follows a recognisable shape, often called the inverted funnel:
- Establish the territory. Why does this area matter? One paragraph, cited.
- Establish the niche. What does existing work cover, and where does it stop? This is where you signal the gap.
- Occupy the niche. State your purpose, your research questions, and briefly your method.
- Preview. Scope, limitations, and how the paper is organised.
The difference matters: an essay introduction can open with a scene, but a research paper introduction that opens with a scene and no citation reads as unserious. For the full Chapter 2 treatment, see our guide to writing a Review of Related Literature.
Write it second, not first
The reason introductions are painful is that they ask you to announce a conclusion you have not reached yet. So do not.
- Write a placeholder thesis. One rough sentence. It will change.
- Write the body. Your argument will shift as you work through the evidence. Let it — an outline built from claims makes that shift visible early.
- Read what you actually argued. Often it is sharper than your placeholder.
- Write the real introduction. Now you know what you are introducing, and the hook can come from your strongest piece of evidence.
- Check the match. Every claim the introduction promises should appear in the body — and nothing major in the body should be missing from the introduction.
If you are completely stuck
Write the sentence "This essay argues that…" and finish it badly. A bad finished sentence is infinitely more useful than a blank page, because you can now see what is wrong with it. ASimplify's introduction generator is designed for exactly this moment: give it your thesis and your main points and it drafts openings you can rewrite, rather than something you are meant to submit as is.
Eight introduction mistakes markers see constantly
- No thesis. The paragraph describes the topic and never makes a claim.
- Thesis buried in the middle. Put it last, where the reader is looking for it.
- Introducing arguments that never appear. Reread the introduction after finishing and fix the mismatch.
- Starting too wide. If your first sentence would work for an essay on any topic, it is too wide.
- Evidence in the introduction. Background is fine; detailed analysis belongs in the body.
- Apologising. "Although this is a complex topic that cannot be fully covered…" Cut it.
- First person where the discipline forbids it. Check your style guide; "I will argue" is standard in some fields and penalised in others.
- Quoting for decoration. If the quotation is not analysed, it is filler.
Before you move on
- Opens with something specific rather than universal
- Gives only the background a reader needs — no more
- Narrows clearly from topic to your particular angle
- Ends on a single, arguable thesis sentence
- Someone could reasonably disagree with that thesis
- Every promise made here is kept in the body
- Roughly 8–10% of total word count
- No dictionary definition, no "since the dawn of time," no undiscussed quotation
- Written or rewritten after the body was drafted
Stuck on the opening paragraph?
Give ASimplify your thesis and main points and it drafts openings you can rewrite — a starting point, not something to submit as is.
Draft an introduction →