If OP isn’t American, school shootings probably aren’t something to even consider… My thoughts go towards being treated poorly by educators more than anything. Bullying from other kids can suck, but in my anecdotal experience (outside the US) the lasting and impactful traumas stem from how teachers and staff deal with the kids.
As someone born and raised in the territories, I don’t think I can claim to be from the “far north”. That’s the Arctic Circle haha