Text Features in Nonfiction

Headings, Captions, Diagrams, and More

Nonfiction text features are tools authors use to help readers find information, understand ideas, and learn new words. These features make informational texts easier to read than a long block of plain paragraphs. When students notice headings, captions, diagrams, and other features, they can read with a clear purpose. Learning these features helps readers study better in science, social studies, and other subjects.

Each text feature has a special job in a nonfiction book or article. Headings and subheadings organize topics, bold words point out important vocabulary, and captions explain pictures or diagrams. A table of contents, glossary, and index help readers locate information quickly. Strong readers use these features before, during, and after reading to understand the text more fully.

Key Facts

Heading = tells the main topic of a section.
Subheading = breaks a big topic into smaller parts.
Caption = explains what a picture, chart, or diagram shows.
Glossary = gives definitions of important words in the text.
Index = an alphabetical list of topics and the page numbers where they appear.
Table of contents = shows chapter or section titles and where each one begins.

Vocabulary

Heading: A heading is a title that tells what a section of text will be mostly about.
Caption: A caption is a short explanation placed near a picture, graph, or diagram.
Diagram: A diagram is a labeled drawing that shows parts of something or how something works.
Glossary: A glossary is a list of important words and their meanings, usually found at the back of a book.
Index: An index is an alphabetical list at the back of a book that helps readers find topics by page number.

Common Mistakes to Avoid

Skipping text features and reading only the paragraphs, which is wrong because important clues and explanations are often in captions, diagrams, and sidebars.
Confusing the table of contents with the index, which is wrong because the table of contents shows sections in order while the index lists topics alphabetically.
Ignoring bold words, which is wrong because bold print often signals key vocabulary that the reader needs to understand the topic.
Thinking photographs and diagrams are just decorations, which is wrong because they often add facts, labels, and visual evidence that support the main text.

Practice Questions

1 You want to find the section called Weather Patterns in a nonfiction book. Which text feature should you check first, the table of contents or the glossary? Explain your choice.
2 A book's index shows Volcanoes ........ 18, 42, 57. If you want all the pages that mention volcanoes, how many pages should you check and what are they?
3 A page has a photograph of a frog, a caption under the photo, and bold words in the paragraph. Explain how each of these three text features helps the reader in a different way.