American Chemical Society
What is Density?
Density: the reason a giant pumpkin will float, but a tiny cranberry won't. Lesson begins with a demonstration of two of the same-sized cubes having different densities. Then pupils take eight cubes, each of the same size, and have to...
Curated OER
Unit Plan for The Catcher in the Rye —A “Place-Based” Approach
"People never notice anything." As part of their study of The Catcher in the Rye, class members adopt Holden Caulfield's approach and spend time as quiet observers of their surrounding, recording their observations/reflections in a...
Curated OER
Identifying Economic Systems
Young historians practice identifying evidence to categorize a particular country's economic system as either a mixed, centrally planned, traditional, or free economic system in this two-part lesson.