Curated OER
Weathering and Soil Formation
A set of 27 slides systematically shows how weathering, erosion, and deposition contribute to soil formation. Both chemical and mechanical weathering are described, as are resulting soil layers and properties. There is no longer any need...
Rainforest Alliance
Get in Touch with Nature
Take a trip to the Colombian rainforest through the sense of touch. Here, class members discover what's inside a mystery box: wood, cinnamon, Brazil nuts, a banana, and orange. Then, the class takes a trip outside for a tree rubbing...