Use headings, captions, and bold words in nonfiction text to preview and understand content.
Nonfiction books use special text features to help you find and understand information fast. A HEADING is a short title above a section that tells you what that part is about. A CAPTION is a sentence under a picture that explains what the picture shows. A BOLD WORD is an important vocabulary word made dark and thick so it stands out -- it is often explained right there or in a glossary.
Before you even start reading a page, glance at the heading and any bold words. That is called previewing, and it gets your brain ready for what is coming.
Mastery looks like: They use headings, captions, and bold words to preview a nonfiction page and predict its content before reading closely.
Common stumbles: Skipping straight past headings and captions to the paragraph text; ignoring bold words instead of pausing on their meaning.