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Why Schools Are Racing to Ban Student Phones
(calckey.world)
This is a most excellent place for technology news and articles.
I can think of an America specific reason to not block all communication with the outside world in a school. Even if every room has a wired landline that worked and was accessible to students and teachers
That's because you lack the political will to fix the actual problem, which isn't an issue anywhere else in the world and has absolutely nothing to do with communications.