At the time, Bethlehem Central was about four months into a near-total ban on electronics in schools. iPhones, earbuds, smart watches, and the rest — gone. During the prior few years, when a class period would end, students would walk in near-total silence through the halls, heads down, engrossed in their phones. Surveillance cameras would sometimes capture distracted teenagers walking into a wall or even, according to Rounds, falling down stairs.