1. Give students a map of the school campus and briefly go over it.
2. Take a walk around the campus and look for signs of erosion and water accumulation. Have students mark these on the map as they see them.
3. Back in the classroom, have students draw on their map where water will flow and accumulate on the surface.
4. After or during a rain, have students actually see and draw (on a new map) the locations of surface water flow and accumulation.