To review the state of research on the association between physical activity among school-aged children and academic outcomes, the author reviewed published studies on this topic. A table includes brief descriptions of each study's research methodology and outcomes. A review of the research demonstrates that there may be some short-term improvements of physical activity (such as on concentration) but that long-term improvement of academic achievement as a result of more vigorous physical activity is not well substantiated. The relationship between physical activity in children and academic outcomes requires further elucidation. (J Sch Health. 2005;75(6):214-218)