In my opinion, we need lots of different kinds of things. Alan has said that he'd like to see a large corpus of new media things, and Dan has mentioned how Squeak could be used to teach a wide variety of things, not just CS and math. There's going to be a need for "books" in a variety of styles, media, and subject matters, I think.
Mark
-------------------------- Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280 (404) 894-5618 : Fax (404) 894-0673 : guzdial@cc.gatech.edu http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html