There are countless openly available course materials in a variety of disciplines if you know where to locate them. SBCTC has vetted the sites that provide the best quality open course materials, such as assessments, syllabi, readings, and lectures. These resources have been assembled to help you choose what best fit your needs.
Simultaneously search OER repositories (from George Mason University Libraries)
OER Commons has forged alliances with over 500 major content partners. Users can search across over thousands of vetted and fully-indexed OER ensuring a high level of resource relevancy and discovery.
Open Education Consortium is NOT a content provider. Instead, they search available open educational materials and provide the links. It is probably the most comprehensive and accurate OER search engine out there.
The MERLOT Collection is made up of over 40,000 materials in 19 different material type categories and growing.
Source: "Course Materials" by Open Washington: Open Educational Resources Network is licensed under CC BY 4.0