I came across this nice looking statistics textbook a couple years ago: http://www.openintro.org/stat/textbook.php http://www.openintro.org/stat/textbook.php

I came across this nice looking statistics textbook a couple years ago: http://www.openintro.org/stat/textbook.php http://www.openintro.org/stat/textbook.php Free online, <$10 in print. There is a high school level stats text book available as well. Its also not "crowd sourced", but the results seem solid.