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7 days ago2 & 3 are not a solution, it’s just ignoring the problem. You think teachers will ever do any teaching if they spend their whole day playing phone police? Unfortunately we have to counteract decades of festering phone addiction and kids are going to have to go cold turkey at some point. The storage solutions are silly but honestly that’s the only way you’ll actually get kids to put their phone away, put it in a locked Faraday bag. And the emergency reasoning is bogus. The teacher has a phone, an intercom, and a panic button. Having 30 kids call 911 while simultaneously making a ~tik tok~ rednote about it is not emergency response.
You might enjoy the book https://theinvisibledoctrine.com/ which thoroughly explains the rise of neoliberal ideology which is responsible for the state of our institutions.