Open Education Resources Updated

From Rice University, Openstax contains peer-reviewed books and other course materials. Online books are free, and printed textbooks are available at low cost.

Popular sites for free online textbooks in a large number of subjects

An excellent source for open textbooks from British Columbia

Lyrx is limited to open textbooks in business, economics, math and statistics

"The NROC Project has been dedicated to creating open educational resources (OER), including free educational websites and digital textbooks, designed to broaden learners’ access to high-quality educational opportunities"

From UC Davis, source for open textbooks in a variety of subjects

Large database for textbooks and other free online resources. Easy to search interface includes a limiter for community college materials

Hosted by SUNY Genesco, Oasis searches through hundreds of sources to locate open access content

Large database of course materials from California State University at Long Beach. You can limit your results many ways, including audience, material type, and peer reviewed,

Open Course Library, from the Washington State Board for Community and Technical Colleges, has full courses for a number of subjects. Note: You may need to request access to some course materials