theodp writes "Unfortunately for textbook publishers, Scott McNealy has some extra time on his hands since Oracle acquired Sun and put him out of a job. The Sun co-founder has turned his attention to the problem of math textbooks, the price of which keeps rising while the core information inside of them stays the same. 'Ten plus 10 has been 20 for a long time,' McNealy quips. 'We are spending $8 billion to $15 billion per year on textbooks' in the US, he adds. 'It seems to me we could put that all online for free.' McNealy's Curriki is an online hub for free textbooks and other course material. Others hoping to bring elements of the Open Source model to the school textbook world include Vinod Khosla (who co-founded Sun with McNealy), whose wife Neeru heads up the CK-12 Foundation, which has already developed nine of the core textbooks for high school."