A while back I had an interesting conversation with my older son, who is in 7th grade. He was telling me about various new rules his school had introduced — like only two bathroom breaks per week per class — which, we agreed, did not make much sense. But then he added: It seems like the teachers also know that the rules don’t make sense. If you talk to them about it, it’s pretty clear that this is something that they’ve just been told they have to say. Then we all forget about it an...