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Lesson Plan
PBS

Pbs: Mathline: Let's Face It [Pdf]

For Teachers 5th - 8th Standards
Check out this math project about polyhedra! Students will enjoy the hands-on activity while they learn about tetrahedrons, hexahedrons, octahedrons, dodecahedrons, and icosahedrons. [Requires Adobe Reader.]
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Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Volume of a Cube

For Students 3rd - 8th Standards
"The volume of a cube can be developed by considering unit cubes, a single row (longs) of unit cubes or a single layer (flats) of cubes using this applet." This easy software makes it possible to easily construct a cube and take it...
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Activity
University of Cambridge

University of Cambridge: Nrich: Building With Solid Shapes

For Students 1st - 2nd Standards
Predict which solid shape constructions would be unstable as shown at this one page website. Solutions are available right at the website.