World Book Online includes the following categories:
World Book Kids: Designed for students in elementary school and based on World Book's award-winning Discovery Encyclopedia, World Book Kids is a children’s learning website that includes thousands of easy-to-read articles, engaging images and illustrations, interactive games and activities, and teacher resources for children.
World Book Student: Designed for students in middle school, this online learning website includes articles from The World Book Encyclopedia, a Biography Center, dictionary, atlas, an extensive multimedia collection, thousands of editor-selected websites, correlations to curriculum standards, and much more.
World Book Advanced: Designed for high school and college students, World Book Advanced is a powerful reference tool that includes an online encyclopedia, multimedia, and primary source databases, fully integrated in a single search.
World Book Timelines: Hundreds of pre-generated timelines across eight broad topics cover various time periods in history or span the life of historical public figures. World Book Timelines also allows users to create their own timeline from scratch, adding events, descriptions, and media.
World Book Enciclopedia Estudiantil Hallazgos: Integrated with World Book Kids and designed for elementary students, this learning resource features interactive components, such as a visual dictionary and World of Animals, as well as highly visual articles all written in Spanish.