The Internet is chock-full of fun activities – both online and offline – using art, geometry, and patterns. Here are just a few of the sites you can check out with your class.

Start your tour at Swarthmore's Geometry Through Art site. Here you'll find invaluable lesson plans and activities you can do on the computer with your class. Next, visit this flexagons page. You'll find geometric figures you can print out and build with your class, complete with instructions and guidelines.

If you're interested in the patterns designed by Dutch artist M.C. Escher, don't miss the World of Escher, particularly the site's online gallery.