Microsoft Mathematics 4.0 is a free download from Microsoft. Mathematics 4.0 is a set of math tools for students to use. It helps students learn how to solve equations step by step along with learning the fundemental concepts in pre-algebra, algebra, trigonometry, physics, chemistry and calculus.
It includes a graphing calculator that works just like a handheld calculator. There are also tools for evaluating triangles, converting units, and solving systems of equations.
The layout is similar to the popular handheld graphing calculators. It is easy to use and navigate, and free.
This is a great resource for math and science teachers and students.