Free, online learning materials with Creative Commons licenses. Many of the collections will have links to the same books, but each will have a particular focus, and items you can't find in other collections.
More than just open textbooks. All content featured within these pages is free but usage rights vary. Materials in these repositories are released under a Creative Commons license while some are in the public domain.
Faculty can evaluate open educational resources using many of the same methods they use to review textbooks and other materials for their courses. They can ask questions such as:
Is the OER peer reviewed?