Study guides & original practice
Topic sentence examples and practice
Write topic sentences that connect a paragraph’s specific claim to the essay’s larger argument.
By ExamCat · Original study lesson · Published September 24, 2026
Understand the method
A topic sentence identifies the paragraph’s controlling idea. The supporting sentences should develop that idea through evidence and analysis. Placement can vary, but putting the claim near the beginning is often helpful when learning analytical paragraph structure.
Worked example, step by step
An essay argues that a fictional town’s public garden strengthens community through shared work. A paragraph will discuss residents cooperating to repair its fence.
- Identify the essay-level claim: shared work strengthens community.
- Narrow the paragraph to one mechanism: repairing the fence requires cooperation between neighbors.
- Draft the topic sentence: The fence repair turns the garden from a shared location into a shared responsibility.
- Follow with a specific scene and explain how dividing tasks changes the residents’ relationships.
A mistake to watch for
A quotation alone usually does not tell readers what a paragraph will argue. A transition such as “Secondly” also cannot substitute for a controlling idea. Check that every example serves the claim you introduced.
Try it yourself: three questions
Write an answer before opening the explanation. For calculations, keep your units and intermediate steps; for concepts, state the reason for your choice.
1. Which is more focused: “There are many things about gardens” or “Shared maintenance gives neighbors a reason to cooperate”?
Show answer and explanation
The second: it identifies a mechanism that evidence can develop, rather than announcing a broad subject.
2. A paragraph begins with fence repair but ends discussing national tax policy. What should you check?
Show answer and explanation
Whether the later material develops the controlling claim. It may need a separate paragraph, a clearer connection or removal.
3. Must every topic sentence repeat the entire thesis?
Show answer and explanation
No. It should advance one relevant part of the argument without mechanically restating the whole essay.
Build your next practice session
Mark the first step where your reasoning differed from the explanation. Turn that step into a question, answer it without looking, then change one condition in the example and explain what would change. A correct guess is a reason to revisit the method.
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