http://blogs.office.com/b/office_casual/archive/2011/07/26/what-mathematics-4.0-can-do-for-students-video.aspxHere's a free graphing calculator students and teachers can use for calculus, chemistry, algebra, and a number of other subjects. Let me and a math whiz take the free download, Microsoft Mathematics 4.0 through its paces in this short video.en-USTelligent Community 1.5.134.15456 (Build: 5.5.134.15456)