How can we model how GPS works?
Instructional video shows how to conduct 5-step student activity to build gum-drop GPS station, learn how GPS works, then model and graph the GPS movement.
This video, Part A, covers Steps 1 and 2: building and using a gumdrop GPS station.
In Part B (steps 3-5), students learn how to read time-series plots and understand how we know the ground is moving.
Demonstration by Roger Groom, Mount Tabor Middle School, Portland OR. Winner of the 2009 NAGT Earth science teacher award.