Why use Sketchpad?

North Carolina's InfoWeb on High School Geometry states that appropriate technology, from manipulatives to calculators and graphics software, should be used regularly for instruction and assessment.

Technology Portfolio Requirement for NC certification.

Sketchpad Activities to Acompany Roads to Geometry

  • Assignment 1: Draw anything, explain using text within your sketchpad document, and create and accompanying script.
  • Proof that all triangles have angle sum 180 degrees in sketchpad (ie mainly text, but each group moved stuff around and incorporated my suggestions into their proof until is was approved as clear and elegant).
  • Visualizing Higher Dimensions: Hypercube
  • Tom Banchoff:
    klein bottle
    Flat Torus in the Three-Sphere

  • The Math Forum's Elliptic Geometry Drawing Tools
  • The Math Forum's Poincare Disk Drawing Tools
  • Dan Bennet's Half Plane Model of Non-Euclidean Geometry