"Instead of mass-produced textbooks, the more than 3,100 sophomores in the state's largest district are learning from an online curriculum developed by their te

"Instead of mass-produced textbooks, the more than 3,100 sophomores in the state's largest district are learning from an online curriculum developed by their teachers over the summer with free software distributed over the web. Engelhaupt, 31, was one of three district math teachers who spent about 100 hours each developing the lessons, which cost the district about $175,000 less than buying new textbooks." http://www.nola.com/newsflash/index.ssf/story/anoka-hennepin-teachers-write-online-textbook/1dbc25bcc4ae4060a421fa204e91c0c8 http://www.nola.com/newsflash/index.ssf/story/anoka-hennepin... here's the link to the book: http://www.ck12.org/flexbook/book/8561 http://www.ck12.org/flexbook/book/8561