These resources have been organized by subject matter. Some of the websites linked on these pages contain both OER and non-OER materials. Occasionally, OER portals or repositories require free account sign-up to access the material. If a link does not work, this may mean that site requires you to sign up for an account.
Always check each item for the appropriate license type before using it as an open educational resource. Open access does not necessarily mean open use, so please check terms for each item. The links below are meant as a starting point for OER research and are by no means a comprehensive list.
These course-specific lists of OER are not exhaustive, but they will be revised and added to over time. Have you found or adopted a resource that you would like to see on the subject-specific lists? Let us know.