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Activity: Rethinking Proof with The Geometer's Sketchpad
Go to: http://www.keypress.com/x5588.xml (opens a new window)
Description: This book harnesses the power of Dynamic Geometry® to engage students in proving conjectures and thinking about proof in different ways. Rethinking Proof offers other motivations for proof besides verification, including explanation, discovery, challenge, and systemization. In the activities, students work with Sketchpad™ sketches to make conjectures. Carefully constructed questions guide students to develop explanations of why their conjectures are true. Comes with extensive teacher's notes, and includes a CD-ROM containing pre-made sketches.
Technology Type: Sketchpad 
Author: Key Curriculum Press/Michael de Villiers
Language: English 
Cost: Requires payment for use

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Activities: Proof as Explanation: Distances in an Equilateral Triangle
Proof as Discovery: Kite Midpoints
Proof as Verification: Areas
Proof as Systematization: Triangle Midpoints
Tools: Proof as Explanation: Distances in an Equilateral Triangle
Proof as Discovery: Kite Midpoints
Proof as Verification: Areas
Proof as Systematization: Triangle Midpoints
Courses: Geometry General