Curated OER
Electromagnetic and Physical Waves
Students compare and contrast electromagnetic and physical waves. In this wave lesson, students discover that all waves reflect, refract, and diffract energy. Students work in small groups to experiment with waves and evaluate the type...
Curated OER
Postcards from California: A Unit on Geography, Social Studies, History and California's Resources
Fourth graders examine patterns that influence population density in the various regions of California. The unit's three lessons utilize graphic organizers for the interpretation and presentation of data.