Curated OER
Watershed Works: Unit 1
By constructing a watershed model and identifying watershed features in it, they discover how water erosion changes the landscape. As with most watershed modeling activities, this one is costly in terms of time and materials. It is,...
Columbus City Schools
The Mystery of Earth’s History
Every living creature can leave a fossil record, yet most fossils belong to extinct organisms rather than ones currently living. Scholars learn about dating rock layers, fossils, and the environment of the past. Pupils understand that...