Open Education Resources

Open textbooks of 40 highest enrolled higher ed courses in British Columbia. CC BY 4.0

Over 2000 open access science, technology, and medicine books also accessible by chapter. 6 peer reviewed journals.

OER for 50+ eTextbooks, supplemental faculty and student materials, accessible

High-quality college textbooks - 15, peer reviewed, open source, free and most used resource. Sciences, mathematics, history, CC BY 3.0

University of Minnesota collection of 100+ college textbooks. Searchable. Business, computer science, econ, humanities, mathematics, sciences, social sciences. CC BY 3.0

Free, openly available arithmetic / mathematics textbooks from WA CTC faculty. Download or order print (-$20) cc by

Open textbooks and open course materials from WA general educational courses from community, technical, & 4 year schools that will be able to transfer to any other education institution in the state. 2012.

Open-content textbook collection in all subjects that anyone can edit. Over 2500.

The closest thing you'll get to a one-for-one swap out of your textbook for OER. From California State University.