 Third rule, phone-free schools. The phone must be locked up in the morning in a phone locker or a yonder pouch. The kids get it back in the afternoon. Otherwise, it's in their pocket distracting them while they're in class, while they're at lunch with each other. They're all paying attention to their phones. And the fourth rule is far more free play, independence, and responsibility in the real world. If we're going to greatly reduce screen use...