Science teachers and students might find it useful to check out The Chemistry Book, an online textbook for high school. The author developed the text as a Wiki. Any member registered on the site can edit the text. He uses it in classes with one or more Tablet and other mobile PCs.
Last summer, one class of low achieving chemistry students used this text to prepare for and to pass the class in order to graduate. They scored in the highest category of the state standardized exam after completing the six weeks of instruction and use of the text.