From Microsoft Office and email, to reading, math, and more—GCFGlobal.org offers more than 200 topics, including more than 2,300 lessons, more than 2,000 videos, and more than 50 interactives and games, completely free.

From the US Geological Survey.

Discussion and analysis of each significant war and conflict worldwide.

Customs, religion, language, dress, diet, and lifestyle on people of many countries

Explore more than 300 full-text reference books with one search.

Biographical information on people from around the world and throughout history. Includes all entries from Contemporary Authors.

Provides periodical and news information from 12,000 titles through an intuitive, user-friendly search interface.

History, literature, science, and social studies articles aimed at middle and high school students.