How do you write a topic sentence?
A topic sentence is usually the first sentence of a paragraph, and it tells your reader exactly what that paragraph will be about. It acts as a bridge between the overall thesis of your essay and the specific evidence you are about to provide. <br><br> Think of a topic sentence like a highway exit sign. When you are driving, a sign tells you exactly what town you are entering so you are not surprised when you arrive. A topic sentence does the exact same thing for your reader: it signals the specific destination of your paragraph before you start unpacking the details, quotes, and analysis.
What makes a strong topic sentence?
A strong topic sentence has two main jobs: it must state the paragraph's main point, and it must connect back to your essay's overall argument (your thesis). It should not be a simple fact that anyone could look up, nor should it be too broad. Instead, it needs to present a specific claim that you will spend the rest of the paragraph proving. If your topic sentence is just a summary of plot or history, you won't have anything to argue or analyze in the sentences that follow.
How to build it step-by-step
To write a great topic sentence, start by looking at your thesis statement. Ask yourself: what is one specific reason that proves my thesis is true? Once you have that reason, draft a sentence that states it clearly. Next, check to make sure it includes a transition from the previous paragraph. Finally, read it out loud to ensure it sets up a claim that requires evidence. If someone can reply 'how?' or 'why?' to your topic sentence, you have successfully set up a paragraph that will answer those questions.
Where students slip up
The most common mistake students make is writing a topic sentence that is simply a fact. For example, 'George Orwell published Animal Farm in 1945.' This is a fact, not a claim, so there is nowhere for the paragraph to go. Another frequent trap is making the sentence too vague, like 'There are many themes in the book.' This doesn't give the reader a specific map for the paragraph. Always ensure your sentence has a distinct point of view that needs to be backed up by the evidence you are about to provide.
Worked through
Imagine you are writing an essay with this thesis: 'High schools should start later in the morning because it improves student health and academic performance.' Write a strong topic sentence for a body paragraph focusing on the academic benefits.
A weak topic sentence would be: 'Schools that start later see changes in grades.' This is too vague. Another weak option is: 'A study showed test scores went up by 5%.' This is a specific piece of evidence, not an umbrella idea for the paragraph. <br><br> A strong topic sentence would be: 'By allowing teenagers to get a full night of sleep, later start times directly lead to higher test scores and better classroom focus.' This sentence works because it clearly states the main idea of the paragraph (higher test scores and focus), connects back to the thesis (later start times improve academics), and sets up a claim that you can now prove using specific studies and statistics in the rest of the paragraph.
Questions students ask
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Where this comes from: Purdue OWL: Paragraphs and Paragraphing · They Say / I Say: The Moves That Matter in Academic Writing by Gerald Graff and Cathy Birkenstein · OpenStax English Composition: Developing Paragraphs
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