You have a class with 30 kids with gaming (or social media or or porn) devices and a teacher whose just as internet addicted behind their own computer at the front expecting the kids to work on their own through the lesson while they do who knows what.
How much YouTube do you think you can you watch in a a high school PE class? About 50 minutes at today’s public schools. The teacher doesn’t care, the principal doesn’t care, the superintendent doesn’t care, and the school board doesn’t care. As long as the PE teacher’s baseball team does well, who cares, right? (Hi Scottsdale Unified School District! I’m talking about you!)