References
- Centers for Disease Control and Prevention. 2004 . Participation in high school physical education-United States, 1991–2003 . Morbidity and Mortality Weekly Report , 53 ( 36 ) : 844 – 847 .
- Hastie , P. and Martin , E. 2006 . Teaching elementary physical education: Strategies for the classroom teacher San Francisco : Pearson Benjamin Cummings .