[faceplanted]

I've been reading this thread and honestly I'm getting the impression that it matters far more what the kids are separated _from_ that whether they're separated at all.

Which tallies with my own experience, in the UK there's secondary school and college (AKA sixth form) before university, which basically means the last two years of high school are separate from the first 5, you go to a different school (sometimes, some places have both on the same campus). And I made the choice to go to a college further out of my way that added 10 hours of cycling onto my commute every week pretty much so I'd never have to speak to anyone from my secondary again, the new place was just another college, no special grade requirements, but not being around the same people and being able to basically "reset" made my life so much better that I can't really argue that never separating kids is a good option.