In today's technology-driven society, children often sit for hours in front of a screen (e.g., computer, TV, video game), exercising only their fingers as they manipulate the keyboard, remote control, or game controller. This sedentary lifestyle contributes to the growing problem of childhood obesity. Data from the U.S. Centers for Disease Control and Prevention indicate that 17% of all children and adolescents in the United States are obese, which is nearly three times the rate of just a generation ago. Children and adolescents who are obese are more likely to become obese adults and to have health and psychological problems, including high blood pressure, Type 2 diabetes, asthma, and poor self-esteem. What can educators do to combat this childhood obesity epidemic? One of the most effective ways is to ensure that youth receive adequate amounts of physical activity at school. This article discusses ways to weave structured physical activity into the school day.