Was gonna blame portable electronic devices like cellphones actually. Saw a news item yesterday showing kids between classes, all of whom we walking while looking down at the devices in their hands.
I think such technology is redirecting attention from academics to whatever they're looking at and talking about. Absent such distractions they'd be thinking about whatever lesson they just left, not what some celeb did, or some friend just texted to them. Outta ban them from schools. No reasonable reason children need such things at school.