Current mathematics instruction often fails to actively involve students. One way to address the problem is through the use of manipulatives, physical objects that help students visualize relationships and applications. We can now use computers to create virtual learning environments to address the same goals. This is a three-year NSF supported project to develop a library of uniquely interactive, web-based virtual manipulatives or concept tutorials, mostly in the form of Java applets, for mathematics instruction. The project is divided into these sections: Number & Operations; Algebra; Geometry; Measurement; Data Analysis & Probability. Within each, you will find a good selection of interactive applications for your K-12 students.

This sites has 12 minute lessons on almost all subjects in Math. These are good reviews for difficult subjects.

Algebasics is an instructional resource for mathematics that helps you understand the basics of algebra. There are sixteen sections ranging from the basics to linear equations and quadratics.

Free math software from Rick Parris (of Phillips Exeter Academy Mathematics Department) that allows graphing of math functions. I recommend the following: Winplot (2D & 3D graphing of equations) Wingeom (geometric graphing) Winarc (math games like Sudoko)

This guide can help you get started in using Winplot as a graphing program on Windows PC.