The introduction is the first thing your marker reads, and it sets their expectations for the entire essay. A focused, confident introduction signals a focused, confident argument; a vague one makes the reader brace for a muddle. The reassuring news is that strong introductions follow a simple, repeatable formula. This complete guide explains exactly what to include, in what order, with examples of weak versus strong openings, the different kinds of hook, and how long your introduction should be.
What an Introduction Has to Do
A good introduction does four jobs in a short space: it grabs attention, gives just enough context, defines the scope, and states your argument. By the end of it, the reader should know precisely what your essay will argue and how it will get there — without you giving away every detail of the analysis to come.
The Four Parts of a Strong Introduction
1. Hook. Open with something specific and relevant — a striking statistic, a pointed question, or a bold but defensible claim. 2. Context. In a sentence or two, give the background the reader needs to understand the question. 3. Scope. Signal what the essay will and will not cover, so the reader knows the boundaries. 4. Thesis statement. State your central argument clearly, and signpost the main points you will use to support it. The thesis is the single most important sentence in the essay — see our thesis statement guide.
Types of Hook
Different hooks suit different essays: a statistic (“One in four UK adults…”), a question that frames the debate, a bold claim you will defend, a brief scenario or a striking quotation from a credible source. Whatever you choose, it must be specific and directly relevant — avoid generic openings like “Since the beginning of time” or dictionary definitions.
Weak vs Strong Openings
Weak: “Throughout history, social media has had many effects on people.” This is vague and unarguable. Strong: “Antibiotic resistance is now one of the greatest threats to global health (WHO, 2023). This essay examines its causes in primary care and argues that prescriber education is the most effective intervention, before evaluating two alternative approaches.” The strong version is specific, evidenced and states a clear position.
How Long Should an Introduction Be?
Keep the introduction to roughly 10 percent of the word count — about 150 words in a 1,500-word essay. If it runs much longer, you are probably including analysis or evidence that belongs in the body.
When to Write the Introduction
Many writers draft a rough introduction first to set direction, then return and rewrite it last, once the essay exists, so the thesis exactly matches the argument they actually made. Writing it last is often the quickest route to a sharp, accurate opening.
Worked Example
For the question “To what extent does remote working improve productivity?”, a strong introduction might hook with a post-pandemic statistic, give one sentence of context on the shift to remote work, define the scope (knowledge workers in the UK), and end with a clear thesis: “This essay argues that remote working improves productivity for knowledge workers, primarily through greater autonomy, but only where collaboration is deliberately managed.”
Common Mistakes to Avoid
✓ No clear thesis statement.
✓ Starting with a dictionary definition or cliché.
✓ Giving too much background and burying the argument.
✓ Promising more than the essay delivers.
✓ Including detailed evidence that belongs in the body.
Tips for a Strong Introduction
Open with a specific hook, keep context tight, define your scope, and end with a clear, arguable thesis. Re-read it after finishing the essay to make sure it still matches your argument — and trim anything that strays into analysis.
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Frequently Asked Questions
What should an essay introduction include?
A hook, brief context, the scope of the essay, and a clear thesis statement.
How long should an essay introduction be?
About 10 percent of the total word count — roughly 150 words in a 1,500-word essay.
What is a thesis statement?
One or two sentences that state your main argument and signpost how the essay will develop.
Should I write the introduction first or last?
Many writers draft it first to set direction, then rewrite it last so it matches the finished essay.
How do I start an essay introduction?
Open with a specific hook — a striking fact, a question or a sharp claim — rather than a generic or dictionary opening.
What is a hook in an essay?
An opening sentence designed to capture interest, such as a statistic, question, or bold but defensible statement.
What should you avoid in an introduction?
Dictionary definitions, sweeping clichés, too much background, and including evidence that belongs in the body.
Does the introduction include references?
It can briefly, to establish context, but the bulk of your evidence and citations belong in the body paragraphs.
How do I write an introduction for an argumentative essay?
Give context, then state a clear, arguable thesis that takes a side and signposts your supporting points.
What is the difference between an introduction and a thesis statement?
The introduction is the whole opening paragraph; the thesis statement is the single sentence within it that states your argument.
Related Study Guides
How to Write an Essay • How to Structure an Essay • How to Write a Thesis Statement • How to Write a Conclusion
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