Teacher Resources for Instructional Planning


Geometry Std 14: Classify polyhedrons according to their properties, including the number of faces.

Lesson Plans Paper Polyhedra Nets Lesson that helps build polyhedra nets. Students explore Euler's theorem. How Many Regular Polyhedrons Are There In This or Any Universe? This lesson a simple to prove but surprising fact of elementary geometry. Constructing the Platonic Solids Geometry and food, make geometric models of polyhedrons out of gumdrops and toothpicks.

Resources: Flash Polyhedra Manipulate these polyhedra and make them spin. Knowhere This site includes material on advanced polyhedra and space filling techniques. It is linked to a site that sells a construction set to construct polyhedra. Interactive virtual-reality polyhedra! Install the VRML program that is linked from this site and jump inside lots of different polyhedra to study them from inside-out. Have the class construct paper models of polyhedra There are more than 80 free nets to print and construct. Virtual Manipulative Virtual manipulates to demonstrate the platonic solids. It has a free-rotate feature and shows the duals of polyhedra. Cross Sections of Polyhedra Very cool virtual manipulative that allows you to look at a cross-section of a platonic solid while you rotate it. Virtual Euler's Formula Virtual Manipulative that lets students investigate Euler's Formula by interactively counting faces, vertices and edges of Platonic solids. Hold down the shift key and click on each edge, face, and vertex until the total agrees with Euler's formula. Mazes Relate the construction and fixed relationships of mazes to the fixed relationships in polygons.
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