A professor has inquired about free or very-low-cost textbooks for an introductory computer science class. I'd like to suggest to her some good sources for open educational resources she could browse and evaluate. What sources does the hive mind of MichLib-L suggest?

Thanks in advance for any information. I am interested in any good sources of OER, not just computer science, although the latter is the subject of the immediate inquiry.

Bradley A. Scott, MLS
Electronic Resources Librarian
Mott Community College
1401 East Court Street
Flint, Michigan 48503
810-762-0405