Pythagorean TheoremMaterials: graph paper (1/4" or larger grid); colored pencils; tape; scissors; chart paper; overhead projector; transparent grid; a second transparent grid (colored, if possible) cut into strips one unit wide and these lengths: 3, 3, 4, 5, 6, 6, 7, 8, 10, 12, 13; three squares cut from a transparent grid: 3 x 3, 4 x 4, and 5 x 5. Preparation: Be sure there are enough materials for each pair of students. If you don't ask students to work in pairs, you'll also need scissors, colored paper, and tape for each student. Make a chart to hang at the front of the class. There should be at least 10 rows on the chart. Prerequisite Skills and Concepts: Students must know how to square a number and what defines a right triangle, as well as the terms leg and hypotenuse.

