http://www.curriki.org The Curriki.org web site offers free textbooks online for USA grades K-12. The service was founded in 2004 by Scott McNealy, co-founder and CEO of SUN Microsystems, an important top-5 company in the mid-ranger computer server and software business. SUN has been owned since 2010 by Oracle, a top database software company. Perhaps McNealy, like Bill Gates who founded Microsoft, gets to do charitable work from now on.