This document is a science lesson plan about biodegradable and non-biodegradable materials. The objectives are to understand the changes materials undergo, use recyclable materials to make products, and differentiate between biodegradable and non-biodegradable materials. The lesson includes a review game, examples of situations with good or bad environmental effects, picture analysis, questions to generalize and apply the concepts, and an evaluation with multiple choice questions to test understanding of biodegradable vs. non-biodegradable materials. Students are assigned to list examples of each.