PBS
Pbs Learning Media: Visualizing Topography
Explore the topography of a hill, a valley, and a cliff in this interactive activity featuring visualizations of three-dimensional topography in two dimensions. Adapted from Stephen Reynolds' "Visualizing Topography."
TeachEngineering
Teach Engineering: Getting to the Point
In this lesson, learners learn how to determine location by triangulation. We describe the process of triangulation and practice finding your location on a worksheet, in the classroom, and outdoors.