The benefits associated with engaging in regular physical activity are well documented, but a large segment of the population is not sufficiently active. School physical educa tion and sport programs are identified as important components in efforts to promote physical activity. Girls are less active than boys, and there is evidence that physical education programs are not effectively meeting their needs. The focus of this chapter is to examine gender as a construct in the domains of physical education and sport, clarifying the reasons girls tend to be less active and less involved in physical education. Following an historical overview, curricular issues and motivational aspects are considered. Implications are focused on ways that educators can provide positive experiences for all students in physical education and sport that will encourage them to adopt and maintain healthy active lifestyles and enhance their quality of life across the life span.