[last updated in early 2012]
EXISTING COLLECTIONS
| inkling $ | - iPad app and texts that can be bought for it, organized by subject - customizable: texts can be bought by chapter - supports live-sharing for a study group | iPad only |
| Flat World Knowledge free | - small catalog of free digital textbooks (about 80 as of 2011/11) | any device |
| ck-12 flexbooks free | - small catalog of free textbooks (about 90 as of 2011/11) - currently mostly for math and science for grades 6-12 - can customize etexts | any device |
| OpenCulture free | - 150 (2011/11) free textbooks - also has free audiobooks, movies, etc - this site is legit -- Dean of Stanford Continuing Studies is an editor | any device |
| CourseSmart $ | - eTextbook rentals - hundreds of titles | iPad, PC |
EFFORTS TO WATCH
| Net Texts | - interactive textbooks, 2011-2012 piloting 8th grade etexts | iPad only |
