National Council of Teachers of Mathematics
Nctm: Illuminations: Patch Tool
Use this tool to design a pattern using geometric shapes.
National Gallery of Art
National Gallery of Art: The Art Zone
Ten interactive activities that allow you to use the computer to create and manipulate works of art.
Technovation
Curiosity Machine: Challenges: Make a Flat Ball
Using simple geometric shapes cut out of paper and taped together to create a ball that is as round as possible with this challenge. This page also includes a lesson plan, tips, and a place for students to document their engineering...