Digital or virtual manipulatives can be a supplement to or replacement for hands-on manipulatives used in the mathematics classroom. Manipulatives represent concretely abstract concepts in mathematics class and link these concepts to prior knowledge. They offer a useful means to introduce new concepts to all students.

http://www.arcytech.org/java/ - The idea is to give the student challenging and motivating problems and have him or her use the tools provided in this site to explore new concepts, discover new ideas, and improve the student's abilities to solve problems. There is a nice section on the Pythagorean Theorem.

Visual Calculus - Contains demonstrations and explorations of many fundamental Calculus concepts, including limits, Linear Approximation and Riemann Sums. Also contains information on how to write calculus programs for TI-83 calculator.

The Wolfram Demonstrations Project - According to the website, the Wolfram Demonstrations Project was conceived by Stephen Wolfram as an open-code resource that uses dynamic computation to illuminate concepts in science, technology, mathematics, art, finance, and a range of other fields.

## Virtual Manipulatives

Digital or virtual manipulatives can be a supplement to or replacement for hands-on manipulatives used in the mathematics classroom. Manipulatives represent concretely abstract concepts in mathematics class and link these concepts to prior knowledge. They offer a useful means to introduce new concepts to all students.

## Research and Thoughts...

## Cool Timer Download

## Resources

## Through Middle School

## 6-12

## Seeing Math

Run Interactives Nowto get started!## NCES

## Virtual Algebra Tiles

## Upper Level Resources

## Just for Fun...