Endorsement or Coercion?

My son (11) and  his my grandson (12) attend the same school and have the same PE teacher. On the walk to the bus stop this week, they were chatting about the class and how today is "Exercises Day," which they do not seem to enjoy as much as "Game Day." My grandson said, "They're going to make us do those sprint things..." I started to reply to him that they cannot actually make you do anything, but before my mouth engaged, I heard in my head the words of as Supreme Court Justice last Monday. And I started wondering about that idea of forcing a 6th Grader to perform an exercise? My son loves his art class, but was complaining that he is the only kid in class who can't use the brush. "Why not?" I asked. The answer makes a lot of sense, but... what if...? Which is why this whole Bremerton High School Football Coach case has me asking a lot of  questions...