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Open Educational Resources (OER): OER Repositories
Search OASIS to find all sorts of open educational material that you can adopt and adapt - including textbooks, auxiliary learning objects, lab manuals, and more. Try searching your discipline to see what's out there.
The Open RN project is funded by a $2.5 million dollar grant from the Department of Education to create 5 OER Nursing Textbooks with 25 associated Virtual Reality scenarios.