That could be a dance class, jogging or Wii sports. With school budget cuts, though, physical education is often the first thing to go. That's a big mistake, says Kazdin."
(Curiously the article overlooks the transport of students to school as a viable, consistent, requisite means of daily exercise. -LS)
"This might be the first class you include in any school curriculum rather than the one you get rid of and you would do it even if you didn't like exercise because we know now that exercise enhances school academic performance," he says. "Why Exercise may do a Teenage Mind Good", Patti Neighmond, NPR.
Here is the paper the NPR article refers to, "Possible Mechanisms Explaining the Association Between Physical Activity and Mental Health", The SAGE Journals, Clinical Psychological Science.