Another resource from Microsoft
http://www.microsoft.com/education/e...ics-guide.aspx
"From basic math to precalculus, Microsoft Mathematics 4.0 can help you visualize and see mathematical concepts as you’ve never seen them before. This free downloadable tool includes step-by-step instructions and explains fundamental concepts. The wide range of tools to help students with complex mathematics includes a full-featured graphing calculator that’s designed to work just like a hand-held calculator and ink handwriting support to recognize hand-written problems."
Their blurb, not mine but might be useful.