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Today we’re going to explore Geogebra.  This is a free program that does a lot of the things Geometers Sketchpad does (they both have nice features that the other doesn’t have, but most of the obvious features are ones they share).

Goals with Geogebra:

  • Construct a parallelogram
  • Show what happens if your reflect an object twice (reflect first in one line, and then reflect the reflection in another line).  Find another way to use a transformation to get from beginning to end.
  • Check out some lessons various people have developed using Geogebra.  Look in Sam Shah’s virtual filing cabinet, and search for “Geogebra”.  Pick a lesson that looks interesting and do it.  What would you/a student learn from this lesson? Was Geogebra an effective way to learn it?

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