Sebastian came home from school and like every day, he barged through the door of my office, and there he was, sweaty and red-cheeked. He’s in third grade and carries a big backpack, which, seconds after he arrives, ends up on the floor, along with his sneakers. / “Grab a snack and do your homework,” I said. I motioned for him to pick up his backpack and pointed to the kitchen, where the kids do their work. Then I got back to my own work.