World Book Advanced More than 1.3 million pages of primary source documents, books, documents, selections fully integrated with the encyclopedia content. Research and teaching tools include timelines, citation builder, and saved research.

Part of the World Book Web suite of online research tools that includes encyclopedia articles, primary source collections, educator tools, student activities, pictures, audio, and video, complemented by current periodicals and related Web sites.

WBW uses a powerful search engine that integrates encyclopedia articles, media, primary source documents, e-books, maps, and more in a single search.

Other special features: Timeline builder; Citation builder; Classroom activities, lesson plans, and discussion guides for every grade level; and Content correlated to state and provincial standards.