Essay types
How to write an expository essay.
By the EssayMate team · Updated November 4, 2026
An expository essay explains a topic clearly and accurately, without arguing for a side. It answers questions such as how something works, why something happened, or how two things differ, using facts, examples and sources.
Informative and explanatory essays are the same thing under different names. The skills, a clear thesis, logical order, and evidence for every point, are the base for almost every other essay you'll write.
What is an expository essay?
It is an essay that informs. Where an argumentative essay tries to prove that one answer is right, an expository essay sets out what is known so the reader understands it. Its tone is neutral, it uses the third person, and its opinions are limited to judgements the evidence supports.
| Expository | Argumentative | |
|---|---|---|
| Purpose | Explain and inform | Persuade with evidence |
| Thesis | States what the essay will explain | States a position to defend |
| Other views | Presented neutrally if relevant | Answered with a rebuttal |
| Typical prompt | Explain how… / Describe the causes of… | Should… / To what extent… |
Five common types
| Type | What it does | Example prompt |
|---|---|---|
| Process | Explains how something works or is done, step by step | Explain how a bill becomes law. |
| Cause and effect | Explains why something happened and what followed | Explain the causes of the 2008 financial crisis. |
| Compare and contrast | Explains similarities and differences | Compare two approaches to treating anxiety. |
| Definition | Explains what a concept means and how it is used | What is sustainable development? |
| Classification | Sorts a topic into categories and explains each | Explain the main types of renewable energy. |
Structure and outline
Expository essays use the standard three-part structure. What makes them work is order: each body paragraph explains one part of the topic, and the parts follow a logic the reader can predict, such as time, steps, importance, or cause before effect.
I. Introduction
Context the reader needs · thesis that names what the essay will explain and how it is divided.
II. First part (for example, the first cause or step)
Topic sentence · facts, examples or data, cited · explanation of how it works or why it matters.
III. Second part
Topic sentence · evidence · explanation · transition.
IV. Third part
Topic sentence · evidence · explanation · transition.
V. Conclusion
The main points drawn together · why the topic matters or what it connects to.
How to write it
- Narrow the topic to something you can explain fully in your word count.
- Research from reliable sources and note where each fact comes from.
- Write a thesis that states what you'll explain and how: "Three factors explain why…"
- Choose an order (chronological, step by step, most to least important) and outline it.
- Draft each body paragraph around one point, with evidence and an explanation.
- Define terms the reader may not know the first time you use them.
- Conclude by drawing the parts together, without adding new information.
Phones in class affect learning partly through the attention they take from students who use them. In a controlled study, students who texted or posted on social media during a recorded lecture wrote fewer notes, recalled less, and scored lower on a test afterwards than students who did not (Kuznekoff & Titsworth, 2013). The effect is not limited to the user: when students in another study saw a classmate multitasking on a laptop, their own comprehension fell too (Sana et al., 2013). Distraction in a classroom, in other words, spreads.
Expository essay checklist
- The thesis explains, it doesn't argue a side.
- Each paragraph covers one part of the topic, in a logical order.
- Every fact is supported and cited.
- Key terms are defined; the tone is neutral and third-person.
- The conclusion synthesises without introducing new facts.
Example papers
Sample papers written with EssayMate, to read for structure and citations, not to copy.
Frequently asked questions
Is an informative essay the same as an expository essay?
Yes. Informative, explanatory and expository essays all explain a topic without arguing for a side; the names are used interchangeably.
Can an expository essay use "I"?
Usually not. Expository essays are written in the third person to keep the focus on the topic rather than the writer's views.
How many paragraphs does an expository essay have?
Often five for a short essay (introduction, three body paragraphs, conclusion); longer essays add a paragraph for each further part of the topic.
Does an expository essay need sources?
Most do: facts and figures should come from reliable sources and be cited in the style your course uses.
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