What are ways to be active during the school day?

Before. During and after school are each different. Physical activity balances mental work and the social stress of school with the need to burn calories and use muscles. Gym and recess used to do this, but not in the age of hand-helds and computer games not. So: walk, work, play physical sports, before during or after school. Team sports require parental involvement... Signing permission and car-pooling.