Well, bells didn't ring. Alarms, like specifically a little note in a teacher's email. Smartphone apps. Cafeteria bigscreens, projectors, etc. It wouldn't 'disrupt' class unless a teacher turned it on, but most teachers would probably allow the viewing of certain fights. I should have been a bit more clear on that, but I didn't want to sound presumptuous. I can say what it did, in theory, but I can't tell you how everyone reacts.