Investigating Geometry Summary

Monday - Friday, July 4 - 8, 2011

Over the next few weeks the Geometry team will be working in groups to create several activities and lessons for use next year.

On Tuesday, Art started with an informal presentation on how to use Geometer's Sketchpad (GSP). A few of us had experience with GeoGebra, so we compared and contrasted GSP and GeoGebra. We spent the rest of the session experimenting in GSP.

On Wednesday Art and Judi talked about some examples of past projects. As a group we brainstormed some areas where students typically have trouble including proofs, similarity, and circle theorems. We informally discussed some past approaches to these topics and continued to play around with GSP.

Thursday and Friday were spent working in groups and starting to formalize project ideas. One group is working on similarity using three approaches: problems styled like our morning session, Build Your Own Blocks (BYOB) an offshoot of Scratch, and GeoGebra. Another group is focusing on the introductory lesson on points, lines, and planes. The third group worked on proving aspects of regular polygon and circle formulas.

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This material is based upon work supported by the National Science Foundation under DMS-0940733 and DMS-1441467. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.