Hi, what do you want to do?
National Council of Teachers of Mathematics
Nctm: Illuminations: Cutting Corners
Students will use their knowledge of plane figure attributes to create and view shapes by cutting and rotating shapes to stimulate discussions on names and attributes of various shapes they do not regularly encounter.
NumberNut
Number Nut: Shapes, Symbols, and Colors: 2 D Shapes
Did you know that two-dimensional shapes are also called polygons? This lesson describes the various 2-D shapes and includes two interactive games to reinforce skills.
NumberNut
Number Nut: Shapes, Symbols and Colors: Two Dimensional Shapes
Describes, with illustrations, the basic two-dimensional shapes students will encounter in elementary Math.