Is there anything more important than the health, well-being and education of a nation's children? This paper takes the position that school is the most important place to educate children about health and to develop lifelong health promoting skills. We believe that health promotion programs and activities are integral to the school's educational program, not as extracurricular, but as central to school's educational mission. In this chapter, we highlight the importance of physical education and physical activity as key components of a well-designed coordinated school health program. We also outline the skills that PE teachers must learn to take a leadership role in the school health movement.