This lesson plan is for a 7th grade life science class about organ systems. Students will start by writing about an organ and the system it belongs to. They will then research their organ system and work in groups to act out skits demonstrating the functions and interactions of organs in their assigned system. By presenting their skits, students will learn how different organ systems work together to keep the body functioning as a whole organism. The lesson aims to help students understand organization in the body from cells to organ systems.