Smarthistory.org is a free and open, not-for-profit, art history textbook. We use multimedia to deliver unscripted conversations between art historians about the history of art.
Gooru is a search engine for learning that allows you to explore and study over 2,600 standards-aligned and personalized study guides. Study guides cover 5th-12th grade math and science topics, and resources include digital textbooks, animations, instructor videos and more.