8    Teachers’ Thinking About Students’ Thinking About Geometry: The Effects of New Teaching Tools

Magdalene Lampert

Michigan State University

This chapter draws on the thinking of a group of secondary school geometry teachers who were participants in the Laboratory Sites Study of the Educational Technology Center (ETC) at Harvard University. The purpose of the Laboratory Sites Study was to understand the process of implementing technology-enhanced guided exploration in school classrooms. A diverse group of school sites were chosen for the study, including an inner city magnet school, a large urban comprehensive school, a suburban school, and a small rural school.

The data analyzed here were collected as a substudy of the Laboratory Sites ...

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