Explaining Glaciers, Accurately

What happens when a geology graduate student and two fourth-grade teachers collaborate on lessons for the classroom? They discover interesting and practical ways to explore geology and other scientific concepts, that's what! Here they share the glacial erosion lessons that grew out of the geologist's frustration at finding glacial erosion labs erroneously showing glaciers eroding by "pushing" rocks. Their goal was to find a way to show and explain glacial erosion more accurately and in a way that elementary age students could understand. (Contains 3 figures and 4 online resources.)