Have Teachers and Students Unplug Chargers When Devices Are Done Charging

Vampire energy might sound like one of the Cullens' superpowers, but it's actually what's drained when a fully charged electronics charger stays plugged in. If your battery is full it's not getting any more charge, but it's still sucking energy. Cut off that greedy charger's supply by unplugging it and encouraging your teachers and classmates to do the same.