Textbook publishers have already enlisted the third-party services of developers to build adaptations of textbooks for the iPad, the Wall Street Journal reports. McGraw-Hill, Houghton Mifflin, Pearson and Kaplan have struck deals with iPhone and iPod touch developers ScrollMotion Inc. to build applications for the iPad that bring test preparation, study guides and new types of instructional materials to the classroom.
http://mashable.com/2010/02/03/textbook-publishers-embrace-ipad/