Paragraph-Level Central Ideas

The exam asks for a paragraph's main idea because passages build their larger point out of smaller ones, and a question can test whether you track that structure. A whole passage might argue that a city's bike network has a flaw. One paragraph inside it might carry a narrower job: showing where the flaw actually sits. If you only read for the big picture, you miss what each block of text is doing, and wrong answer choices often borrow language from the wrong paragraph or blur two paragraphs together.

Every paragraph has its own miniature version of claim and support. The support can be a statistic, a fact, a description, or an example, but the claim is what the writer wants that material to add up to. A paragraph that opens with a number is rarely just reporting the number. It is using the number to set up a point that usually lands in the paragraph's last sentence or two, often after a shift signaled by a word like yet, but, or the point is. Read the opening for the raw material and the closing for what the writer does with it.

This skill sits one level below finding the central idea of a whole passage and one level above spotting a theme, which is a passage's implicit idea rather than its stated one. It also feeds directly into summary questions, since a good summary of a passage is really a chain of its paragraphs' main ideas, each one doing a distinct job: setting up, complicating, explaining, or applying. Some paragraphs have no complete claim of their own at all. Their only job is to hand off to the next one, and the question about them tests whether you can see that handoff rather than invent a claim that isn't there.