The Mason OER Metafinder allows you to simultaneously search across the multiple OER repositories (e.g., MERLOT II, OAOpen.org, OER Commons, OpenStax CNX, etc.) as well as many open archival repositories (e.g. HathiTrust, Internet Archive, Project Gutenberg, etc.).
Openly Available Sources Integrated Search (OASIS) is a search tool that aims to make the discovery of open content easier. OASIS currently searches open content from 52 different sources and contains 155,375 records. Great place to search when you know what type (audio, textbook, etc.) of material you are looking for.
These OER repositories include textbooks, course materials, videos and more. They are some of the best places to start your search.
Contains links to a wide range of multimedia objects form libraries, archives and museums around the United States.
The copyright status of items vary because it is collected from many sources. However, many items are public domain or available for re-use, and there is information in a "rights" field for each item.
The Teaching Commons brings together high-quality open educational resources from leading colleges and universities. Curated by librarians and their institutions, the Teaching Commons includes open access textbooks, course materials, lesson plans, multimedia, and more.
A bank of OER, linked to the school curriculum, and designed to support teachers and teacher educators in developing active approaches to learning. The network is co-ordinated by The Open University, UK. Contains links to other Africa-centered OER.
The LibreTexts project is a multi-institutional collaborative effort to improve education at all levels of higher learning by developing Open Access Resources. Use the top navigation to switch subject areas.