http://www.nature.com/scitable
Scitable lets a teacher set up a class and customize a textbook.
What's interesting is that it's run by arguably the best Journal in science, Nature.
It focuses on bio (of course). It's useful for AP bio but I plan to use it for our school's synthetic biology club.
The book creation feature allows one to select content from the books available, add content from others, and create content.
It's all free and if it can be done with high level bio content, it can be done with any content. I would expect to see copycats soon.
Of course, these customized books painstakingly developed by a teacher and optimized for their kids haven't been tested in court with regards to the Williams decision. Nor do they meet the College Board's guidelines for textbooks. However, they can help kids learn. Eventually the bureaucracies may get into the 21st century. Until then the online books are a good supplement to the paper books.
