A reference work covering history, geography, the sciences, religion, sports, entertainment, technology, and the arts.

The A.D.A.M. Health Illustrated Encyclopedia includes over 4,000 articles about diseases, tests, symptoms, injuries, and surgeries. It also contains an extensive library of medical photographs and illustrations.

Includes astronomy, chemistry, mathematics, physics, and scientific biography with definitions, diagrams, formulas, cross-references, and more. Search alphabetically or by topic. The author is a scientist with advanced degrees in physics and planetary science.

Articles are currently from three sources: (1) original contributions by specialized philosophers around the internet, (2) adaptations of material written by the editors for classroom purposes, and (3) adaptations from public domain sources. The Search feature does not always work well so I would suggest browsing for your topic.

Intended to provide a comprehensive description of the enterprise of education both within the United States and throughout the world. Approximately 900 articles offer a view of the institutions, people, processes, and products found in educational practice.

The most comprehensive and authoritative source of information on all things Canadian. Many of the articles also provide a link to a Junior Version of the articles especially for younger readers.