Repositories and Search Engines for OER
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OpenStaxMany people's starting point for OER. Rice University's Connexions provides peer-reviewed open textbooks, but also has OER in many formats.
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MERLOTVery large repository of OER covering various subjects and education levels (undergraduate, secondary education, etc.).
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Mason OER MetafinderFederated search engine that returns results from across 15 OER repositories.
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OASISA user-friendly OER search engine.
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Pressbooks DirectorySearchable catalog of largely accessible and interactive OER books.
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B.C. Open Collection by BCcampusOER repository covering various subjects primarily at undergraduate level with some graduate level too.
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Teaching CommonsOER from leading colleges and universities, curated by librarians and their institutions.
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Open Textbook LibraryOER textbooks curated by the University of Minnesota.
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OER CommonsOER repository covering various subjects and education levels (undergraduate, secondary education, etc.).