World Book Online is a suite of online research tools that delivers encyclopedia articles, primary source collections, educator tools, student activities, pictures, audio, and video, complemented by current periodicals and related Web sites. All the databases are editor-screened for authenticity and age-appropriate content.

World Book Web includes: World Book Dictionary, World Book Atlas, World Book Advanced (for high school and college students), World Book Kids (for younger users), and Enciclopedia Estudiantil Hallazgos.

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.