A well-structured essay is one of the most important skills in academic English. This guide explains the three-part structure — introduction, body, conclusion — used across disciplines at university. You'll learn what each section must contain, see fully annotated examples, and get a template you can apply immediately. For a broader overview, see our Academic English Complete Guide.
All academic essays follow the same proportional structure. This is often called the 10-15-75 rule (or 15-75-10 when starting from the introduction):
The introduction does three jobs: grab attention, provide context, and state your argument.
The hook is your first sentence. Its only purpose is to make the reader want to continue. Avoid clichés like "Since the dawn of time..." or "In today's world...".
Two or three sentences that define key terms, provide historical or statistical context, and narrow the focus from general topic to specific argument.
The thesis is the single most important sentence in the essay. A good thesis is specific, arguable, and predictive (it previews the structure).
Each body paragraph should develop one main point. The most reliable structure is PEAL:
| Element | Purpose | Example |
|---|---|---|
| Point | Topic sentence stating the paragraph's main idea | "The most harmful feature of social media is its algorithmic reinforcement of negative content." |
| Evidence | Fact, quote, statistic, or example | "Smith et al. (2021) found that 68% of teens reported feeling worse after viewing recommended content." |
| Analysis | Explain how the evidence supports your point | "This suggests that algorithmic feeds are not neutral — they amplify emotional content precisely because it drives engagement." |
| Link | Connect to the next paragraph or back to the thesis | "This psychological mechanism leads to the second major issue: the normalisation of comparison." |
The conclusion should feel like an arrival, not a retreat. It has three jobs:
Do not copy-paste. Reword it to show depth of understanding.
Two or three sentences that revisit your body paragraphs in compressed form. Remind the reader how your argument unfolded.
End with a broader insight, a recommendation, a call to action, or a question for future research. Do not introduce new evidence.
Transitions signal logical relationships between ideas and guide your reader through the argument. Use them sparingly — one per paragraph is usually enough.
| Function | Academic transitions |
|---|---|
| Adding a point | Furthermore, Moreover, In addition, Additionally, Similarly |
| Contrasting | However, Nevertheless, In contrast, Conversely, On the other hand |
| Cause / effect | Therefore, Consequently, As a result, Thus, Hence |
| Illustrating | For example, For instance, To illustrate, Specifically |
| Emphasising | Indeed, In fact, Particularly, Notably |
| Sequencing | Firstly, Secondly, Finally, Subsequently, Meanwhile |
| Concluding | In conclusion, To summarise, Overall, In summary |
Below is a short argumentative essay on social media regulation, with every structural element labelled.
In 2024, the average teenager spent more time on social media than on any other single activity — more than homework, sport, or face-to-face conversation combined. Hook
Social media platforms are designed to maximise engagement, and engagement is driven primarily by emotional content. Over the past decade, researchers have documented sharp increases in adolescent anxiety, depression, and sleep deprivation that correlate with the rise of algorithmic feeds. Background
This essay argues that although social media enables valuable global connection, its core design features — infinite scroll, algorithmic amplification, and social validation metrics — actively harm adolescent mental health, and therefore require regulatory intervention. Thesis
The most harmful feature of social media is its algorithmic reinforcement of negative content. Point Smith et al. (2021) found that 68% of teenagers reported feeling worse about themselves after viewing algorithmically recommended content, compared to 22% after viewing content they had chosen deliberately. Evidence This suggests that algorithmic feeds are not neutral conduits of information — they actively amplify emotional content because engagement rewards it. Analysis This psychological mechanism leads directly to the second issue: the normalisation of constant social comparison. Link
A second harm arises from the social validation metrics built into every platform. Point A longitudinal study by Chen and Rahman (2023) tracked 4,000 adolescents over three years and found that each additional hour of daily social media use increased self-reported social comparison by 12%. Evidence Because these metrics quantify social worth as a number, they convert ordinary peer relationships into competitive rankings — a shift with no historical precedent. Analysis Together, algorithmic amplification and quantified comparison form a mutually reinforcing cycle that no individual user can reasonably be expected to break alone. Link
In conclusion, social media's negative mental health effects on adolescents are not accidental side effects — they are predictable outcomes of design choices that prioritise engagement over wellbeing, which makes targeted regulation not just advisable, but necessary. Restated thesis
Algorithmic amplification and quantified social comparison together create a psychological environment that adolescents are developmentally unprepared to resist. Summary
If current trends continue, today's adolescents will become the first generation to be diagnosed with anxiety in larger numbers than they graduate — a legacy no algorithm should be allowed to write. Final thought
Use this skeleton to plan any academic essay. Fill in each bracket, then expand into full sentences.
Get the printable PDF with the template above, plus 10 guided exercises on thesis statements, topic sentences, and PEAL paragraphs.
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