Substantial scientific evidence supports the role of physical activity in disease prevention and healthy lifestyle promotion, and quality physical education represents our best opportunity to provide all children with experiences that promote physical activity now and for a lifetime. The purpose of this article is to document the need for quality physical education, given the current trends of obesity and physical inactivity among youths and adults, and to discuss 10 reasons why all youths need quality physical education that physical educators can use when communicating the profession's scientific base to the general public. (Contains 1 table.)