Geometer’s Sketchpad is powerful, dynamic software for exploring mathematical ideas. We provide here some introductory lessons, designed by Dr. Janet Bowers, that will help you explore some of the geometric ideas from Part III of Reconceptualizing Mathematics: Reasoning About Shapes and Measurement. The software is available from Key Curriculum Press, a company which also provides a much longer an online course on using Geometer’s Sketchpad. This course was also designed by Dr. Bowers.

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