> Scandinavia though, where they are years ahead in that respect and have already begun taking digital devices out of the classrooms again

While I personally suspect that social media and by extension phones are detrimental: what you're writing here is opinion, not fact.

Just like adding tech was an experiment which seems to have been accepted all over, removing the tech again is - at least to my knowledge - in experiment phase, too.

And because a real experiment would take roughly 12-20 years (students performance from start to finish, until they're gainfully employed)... Neither of these approached have really been validated. It's all speculation, because there are so many other reasons that could explain the issues we currently have in our schools

And frankly - even though I honestly believe that social media is bad for them - I sincerely think its nowhere close to being the main reason for dropping performance, inability to take responsibilities or whatever else people are saying about the current children.