Free Online Textbooks at Connexions

I've been searching for free online textbooks of sufficient quality.  I found this:  http://cnx.org/

College Physics is high quality.  http://cnx.org/content/col11406/latest/

Grade 10 chem is pretty good.  http://cnx.org/content/col11303/latest/

There are 169 pages worth of links to free online books in Science and Technology alone.

The College Physics book contains quality exercises for immediate reinforcement but not enough for drill and practice or problem sets.

General Chemistry I is incomplete.  Combined with General Chemistry II there is almost enough for a full book (with no problems/solutions).

I recommend that teachers visit this site and if they like a book, link to it for their students.  That way, students always have access to a textbook if they have internet access.


I'm going to keep searching for a trove of problems with solutions and explanations to supplement my own.