NOAA
Noaa: National Ocean Service Education: Global Positioning Tutorial
Illustrated tutorial explains the history and science of geodesy. Animations help students visualize how scientists measure and monitor the size and shape of the Earth and the location of points on its surface.
NASA
Nasa: Slr and Gps (And Plate Tectonics and Earthquakes) [Pdf]
This slideshow explains how satellites are used to measure the movement of tectonic plates.
Science Education Resource Center at Carleton College
Serc: How Do Volcanoes Form? How Do They Impact Our Lives?
This class activity provides hands-on information to students on how these volcanoes form and how they affect the plant and animal life.
Curated OER
Hartao: An Introduction to Plate Tectonics
Introduces South African Alexander Toit as naming Gondwanaland and Laurasia.