This document discusses the principles of exercise and fitness, including the five components of fitness: aerobic capacity, muscular strength, muscular endurance, body composition, and flexibility. It also discusses how physical fitness is tested in students using FitnessGram testing, which measures these five components. Additionally, it covers learning how to participate in sports and physical activities, both team and individual, and the focus of physical education classes, including developing skills, learning rules and safety, and identifying benefits of physical activity.