Determining the Central Idea of a Text

A short text on the exam always has one job: make a claim and back it with detail. The details change from passage to passage, a weaver's dye recipes, a cemetery's bee count, a composer's lost scores, but the structure doesn't. Somewhere in the text is a sentence that states a general point, and the rest exists to support, illustrate, or complicate that point. Your task is to find the sentence doing the claiming and ignore the sentences doing the supporting.

Build this by reading for what repeats. Track what each sentence is really about, not its topic word but its point, and watch for the idea that shows up again at the start and the end. In a three-sentence text, the first sentence often sets up a question or situation, the middle gives a specific case or number, and the last sentence tells you what that case proves. That last move, turning a specific case into a general claim, is usually where the central idea lives. Sketch it as a scope circle: the big circle is the claim, and every fact, date, or percentage is a smaller circle feeding into it. If an answer choice only restates one of the small circles, it's too narrow. If it makes a claim the text never actually supports, it's too broad.

This skill sits right next to finding textual evidence, because once you know the central idea, the evidence questions ask you to point at the sentence that proves it. It also feeds inference questions, which ask you to extend the central idea one logical step further than the text states outright.