Here are some helpful OER Repositories you can check out.

1. MERLOT This is a repository of open materials, videos, animations, graphics, lecture notes, websites, and textbooks that are open for instructor adoption and adaptation.
2. OER Commons This is a repository of open materials, videos, lecture notes, and textbooks.
3. Saylor Open Textbooks Saylor Academy offers open textbooks and courses that are completely free.
4. Open Course Library This is a database of open courses and their respective materials that you can research and use.
5. Open Textbooks on OER Consortium This listing of textbooks within specific disciplines comes from the Community College Consortium for Open Educational Resources.
6. Openstax From Rice University, Openstax is a nonprofit organization which creates free, peer-reviewed textbooks in a variety of disciplines.
7. College Open Textbooks Offers materials for community colleges and other two-year colleges. Textbooks on this site are peer-reviewed.
8. Lumen Learning Lumen provides open courses for free or at minimal cost.
9. British Columbia Open Campus Textbook List This list of textbooks out of British Columbia focuses on the top subjects in B.C.
10. University of Minnesota Open Textbook Library This open textbook library contains free and peer-reviewed textbooks.
11. Wikibooks This is an open-content textbooks collection.
12. Skills Commons This is a free and open digital library of workforce training materials.
13. The OER Catalogue Open Educational Resources for Higher Ed

OER Web Search Tips 

Google can be helpful–use Google Advanced Search 

Pair CC keywords, Boolean operators, and discipline-specific terms to yield results: 

• Use and, or, not 
• Example: “James Baldwin” not Alec 

Use quotes to yield more precise results: 

• “CC BY-SA”  
• “CC BY-SA-NC” 
• “Creative Commons” 
• Repository 
• “Open Access” 
• “Open Educational Resource” 
• Or just search OER