Suggestions for some OER for statistics:

Concepts and Applications of Inferential StatisticsĀ», which is a free, full-length, and occasionally interactive statistics textbook. It is a companion site of Ā«VassarStats: Web Site for Statistical ComputationĀ». The materials on this site may be freely used for any non-commercial educational purpose.

Online Statistics Education: An Interactive Multimedia Course of Study. A full online course.

OpenIntro: Statistics. (OpenIntro LaTeX, code, and PDFs are released under a Creative Commons BY-SA 3.0 license unless noted in the Exceptions. Any materials reposted online must include a visible link to an appropriate OpenIntro page.)

StatSoft: an Electronic Statistics Textbook begins with an overview of the relevant elementary (pivotal) concepts and continues with a more in depth exploration of specific areas of statistics.

Thanks, Jeffrey!