I think a big part of this is society's expectations. For example while there was bullying in my primary school - there was no bullying because you were good

I think a big part of this is society's expectations. For example while there was bullying in my primary school - there was no bullying because you were good at math. The opposite was true - if you were bad at math it meant you're "dumb" and kids will laugh at you. It wasn't all perfect - it was uncool to try hard (means you're dumb and have to work for it and that's boring) but it was very fashionable to instantly know every answer. So teachers had it much easier because kids had intrinsic motivation to learn math. Another part of it was probably that the unemployment was at 20% at that point and everybody realized you have to be well educated to have a chance of good job.