There are many “standards” of metadata in the OER universe, and it is advised that you make a practice to check the rights of any item you use.
Developed at George Mason University, the Mason OER Metafinder helps you find Open Educational Resources, and unlike other OER discovery sites that search a static database, the OER Metafinder launches a real-time, simultaneous search across 22 different sources of open educational materials. It searches well-known OER repositories such as those listed below, but also sites such as HathiTrust, DPLA, Internet Archive and NYPL Digital Collections where valuable but often overlooked (and often “open”) educational materials may be found.
Multimedia Educational Resource for Learning and Online Teaching (MERLOT) is a curated collection of free and open online resources that can be used for teaching, learning, and faculty development.
OER Commons is a digital library of open educational resources that offers a comprehensive infrastructure for curriculum experts and instructors at all levels to identify high-quality OER and collaborate around their adaptation, evaluation, and use.
Textbooks in the Open Textbook Library are considered open because they are free to use and distribute, and are licensed to be freely adapted or changed with proper attribution. Open Textbook Library is from the Open Education Network (OEN).
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 127 different sources and contains 448,732 records. OASIS is being developed at SUNY Geneseo's Milne Library.
