Terracycle, an organization that transforms trash into new products, has a new curriculum series on Waste. Each set of lessons is tailored to K-2 and grades 3-5, 6-8, and 9-12 and meets McRel National Standards (listed in each lesson plan). The series is being developed by The Cloud Institute. Check out their first set of lessons: Natural Laws and Principles of the Materials Cycle. A downloadable storybook or handout is provided for most levels.