Geometry and Geodesy: Estimating the Earth’s Circumference with Prospective Elementary Teachers

Year: 2009 Authors: Sandy Spitzer

Core claim

A historical geodesy activity can strengthen prospective elementary teachers’ understanding of modeling, measurement, similar figures, and proportional reasoning.

Topics

Eratosthenes experiment, dynamic geometry, proportional reasoning, teacher preparation

Domains

geometry, geodesy, similar figures, measurement, educational design, visual modeling

Methods

shadow measurement, dynamic geometry software, proportion setup, group discussion

Media

yardstick, string, dynamic geometry software, internet research

Source status

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