Students build model caverns using paper mache or clay and bury them in a tray of sand. They test the models by dropping balls onto them to simulate an asteroid hitting the earth. They evaluate the effectiveness of a structure against...

Fourth graders complete a compare and contrast activity for American agriculture historical events. In this historical events in agriculture lesson, 4th graders review a timeline and complete research for agriculture in the 20th century,...

High schoolers explore how predators help control the growth of prey species for a more balanced ecosystem.