Essay writing

How to write a body paragraph

A body paragraph proves one point that supports your thesis. Start with a topic sentence that states the point. Add evidence, such as a fact, an example or a quotation. Then explain how the evidence proves your point, which is the step most students skip. End by linking back to the thesis or leading into the next paragraph. Many teachers call this claim, evidence, reasoning.

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The four parts

PartWhat it doesExample (thesis: high schools should start later)
Topic sentenceStates the one point of this paragraphA later start would help students sleep enough to stay healthy.
EvidenceGives proof: a fact, example, statistic or quotationA 2014 policy statement from the American Academy of Pediatrics names school start times before 8:30 a.m. as a key cause of teens not getting enough sleep.
ExplanationSays how the evidence proves the pointIf doctors see early start times as a main cause of lost sleep, then moving the start later is one of the few changes a school can make that directly gives students more rest.
LinkTies back to the thesis or leads to the next pointBetter sleep is only the first benefit; it also shows up in class.

Weak vs strong

WeakStrongWhy
Topic sentence: Sleep.Topic sentence: A later start would help students get the sleep they need.A topic sentence is a claim, not a single word or topic.
A quotation dropped in, then a new pointA quotation followed by one or two sentences explaining itEvidence does not explain itself. The reader needs your reasoning.
Three different points in one paragraphOne point, fully provedPurdue OWL advises limiting each paragraph to one main idea.

Worked examples

Example 1: build a paragraph from an outline point

Problem Outline point: A town pool would create summer jobs. Evidence: the pool would need lifeguards, swim teachers and snack bar workers.

  1. Topic sentence (the claim): A town pool would also create summer jobs for local teenagers.
  2. Evidence: A pool needs lifeguards, swim teachers and snack bar workers every day it is open.
  3. Explanation: Many of those jobs fit teenagers, who would get their first work experience close to home instead of driving to the next town.
  4. Link: Those jobs would keep money and young people in town, which matters for the next reason as well.

Answer A paragraph with one claim, specific evidence, an explanation of why it matters, and a link forward.

Example 2: fix a dropped quotation

Problem Phones distract students. One teacher said, "I lose ten minutes a class to phones." Also, phones make cheating easier.

  1. The quotation is followed by a new point, with no explanation. That is a dropped quotation.
  2. Add the reasoning: Ten minutes a class adds up to almost an hour a day of lost teaching time.
  3. Move cheating to its own paragraph, since it is a different point.

Answer Phones distract students. One teacher said, "I lose ten minutes a class to phones." Across six classes, that is almost an hour of lost teaching time every day.

Common mistakes and fixes

MistakeFix
Summarizing instead of explainingDo not just repeat the evidence. Say what it proves and why.
Topic sentence that is a factMake it a claim that supports the thesis.
Evidence with no sourceSay where it came from: a study, an expert, a text, page numbers.
Paragraphs that switch topics halfwaySplit them. One paragraph, one point.
Ending on a quotationEnd with your own words that tie the point back to the thesis.

Practice

Five body paragraph questions

  1. What is the job of a topic sentence?

    1. To state the one main point of the paragraph
    2. To quote an expert
    3. To summarize the whole essay
    4. To give the title of a source
    Show answer

    Answer: To state the one main point of the paragraph

    The topic sentence states the claim the paragraph proves. Quotations are evidence, the whole essay is summarized by the thesis and conclusion, and source titles go in citations.

  2. A paragraph quotes a source, then immediately moves on to a new point. What is missing?

    1. A hook
    2. A second quotation
    3. A thesis
    4. An explanation of how the quotation proves the point
    Show answer

    Answer: An explanation of how the quotation proves the point

    Evidence needs reasoning after it. Hooks and theses belong in the introduction, and adding more quotations without explanation repeats the same problem.

  3. Topic sentence: A later start time would improve students' health. Which sentence does NOT belong in this paragraph?

    1. Teenagers need about eight to ten hours of sleep a night.
    2. The cafeteria should also serve more vegetarian food.
    3. Students who sleep more get sick less often.
    4. A later start would give students more time to sleep.
    Show answer

    Answer: The cafeteria should also serve more vegetarian food.

    It is about school lunches, not start times or sleep, so it breaks the one-point rule. The other three support the paragraph's claim about health.

  4. Evidence: A study found that students at schools that started later slept about 30 more minutes a night. Which sentence explains the evidence instead of repeating it?

    1. The study found students slept about 30 more minutes.
    2. Sleep is important.
    3. This shows that a later start gives students more sleep, and over a school year those minutes add up to many extra nights of rest.
    4. Studies are done by scientists.
    Show answer

    Answer: This shows that a later start gives students more sleep, and over a school year those minutes add up to many extra nights of rest.

    It says what the number means and why it matters. The study found... repeats the evidence, Sleep is important is too vague, and Studies are done by scientists has nothing to do with the point.

  5. How many main points should one body paragraph usually prove?

    1. As many as fit
    2. Two
    3. Three
    4. One
    Show answer

    Answer: One

    Purdue OWL advises limiting each paragraph to one general idea. More than one point makes the paragraph hard to follow; split it instead.

Frequently asked questions

How long should a body paragraph be?

Long enough to prove one point: usually five to eight sentences in a school essay. That gives room for a topic sentence, one or two pieces of evidence, an explanation for each, and a link. Length matters less than whether every sentence serves the point.

What counts as evidence?

Facts, statistics, examples, quotations from a text, expert opinions, and in some essays your own observations. Pick the evidence that most directly proves your point, and say where it came from. For research papers, cite it in the style your teacher asks for.

What do PEEL, CER and TEA mean?

They are teaching shortcuts for the same idea. CER is claim, evidence, reasoning. PEEL is point, evidence, explanation, link. TEA is topic, evidence, analysis. Each one reminds you to state a point, prove it, and explain the proof.

Sources

  1. Purdue OWL, Body Paragraphs, accessed October 1, 2026
  2. Purdue OWL, Argumentative Essays, accessed October 1, 2026
  3. American Academy of Pediatrics, School Start Times for Adolescents, Pediatrics 134(3), 2014 (PubMed abstract), accessed October 1, 2026

Try asking Ducky

  • “Read this body paragraph and tell me where I drop a quote without explaining it.”
  • “Does every sentence in my paragraph support the topic sentence?”
  • “Ask me so what after my evidence until I write a real explanation.”

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