Ban mobile phones in schools. Gate to gate, first bell to last. Successful options include: 1. Complete physical ban 2. Turned off, never visible 3. Handed in (office, pouches, teacher desk) All of these need exceptions for exceptional circumstances. All of these need to be systematic, whole-school and patrolled, with consequences. It’s not easy but it’s not complex either. And the benefits are enormous. Especially weighed against the harms. I hear people saying ‘this is too hard to do’. Which is news to the hundreds of schools I’ve seen do this successfully. And you know what? They never regret it. Not one of them would reverse the policy.