An introduction to a piece of writing does two important things: (1) It states the writer’s main idea, and (2) it gives readers an idea of what supporting material will follow. When writing a rough draft, the first step is to write a topic sentence that expresses the main idea. Some writers also try to capture their readers’ interest with a “hook,” or attention grabber. A hook might be-
an interesting fact or statistic
a brief generalization
an example that illustrates the main idea
Although hooks are not essential to the understanding of a piece of writing, readers do expect to find a clear main idea in the introduction and a short preview of what the piece is about.