This lesson plan focuses on explaining the three energy systems - ATP-CP (anaerobic alactic), anaerobic glycolytic, and aerobic. Students will participate in different physical activities to experience each energy system, and analyze which is easiest to perform. The teacher will explain the science behind each system, including how food is converted to ATP for energy and the role of oxygen. Students will identify which activities use each energy system and differentiate the systems based on duration and intensity. The lesson aims to help students understand and appreciate the process of their body's energy systems through physical activity.