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.
Part A, covered the steps to build and use a gumdrop GPS station.
In this video, Part B, 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.