[Free Registration/Login may be required to access all resource tools.] The PLIX interactive source allows students to use base ten blocks to explore place value and numbers in the hundreds. There is also a video that describes how to...

This is a question/response site with the topic of volume. A student asks for help finding the volume of a tent, a cube, and other regularly dimensioned objects.

This site includes an interactive math tool to create drawings on isometric dot paper. You can draw figures using edges, faces, or cubes. Rotate and color your drawings, and view them in 3D or 2D.

This MathWorld site shows pictures of polyhedra which can fill space. A discussion of these figures follows.

This question and answer site provides a lot of basic information about polyhedra. The five regular polyhedra, "The Platonic Solids," are described.

This site from the Drexel University is a detailed explanation of area and volume for those who have trouble with the concept and need an explanation of how they are related and their differences, and other basic concepts for a clear...