4-H Polymers: Be a Scientist! Materials in a Green, Clean World, Grades K-2Be a 4 H Scientist! Materials in a Green, Clean World is an inquiry based science curriculum focusing on the following concepts: materials; plastics; the three R's: Reduce, Re use, Recycle; the work of scientists and engineers. The curriculum is designed to build foundational skills of science and engineering: observation, asking questions, sorting and classifying, and communicating. The curriculum contains six learning modules intended for delivery