Multidisciplinary repositories of open textbooks and similar resources. These repositories may also include multimedia or other courseware but they're primarily foused on open textbooks.
Collections of primarily public domain (out-of-copyright) books.
Open courseware could include textbooks, quzzies/tests, lectures, A/V materials, and other educational resources.
Other open textbook repositiory collections.
OER repositiories related to science, technology, and medical disciplines.
A list of resources to help you locate open source images and educational videos.
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