OER as a system relies on attribution and mindful licensing to thrive. Not all resources on this page are fully free or OER, but do fit within a larger textbook affordability strategy. Creative commons licensing defines boundaries and permissions for Reusing, Revising, Retaining, Redistributing, & Remixing OER content.
For more information about Creative Commons and quick reference to license definitions see the Creative Commons page.
Digital Public Library of America - exhibits, images, documents from American history
ChildTrends.org - aggregated topical writing on childhood related social issues
Perseus Digital Library - hosted by Tufts University, a collection of digitized artifacts of the ancient world
OpenFolklore - journals, OA books, gray literature for folk culture studies