Over here it was something like 30+ kids in one class (who had all their classes together), and I think in primary school (year 7 to year 14) all teachers but the gym coaches were assigned their own class - they'd get an additional period with them to make sure there were no problems etc. We had the perfect teacher in the first four years, she'd notice everything in minutes and solve it terribly smoothly. It worked the same way in secondary school (ok, more teachers didn't have their own classes since there were so many subjects), and there it helped that everyone in my school was a geek. We went with the entire class to see the first Matrix, for one...
I think the stable classes themselves might contribute to having less problems - even if there were quarrels and cliques in our class A (and there were, I even had a nemesis yay!), the moment someone from class B (or gods forbid C through E, since prestige was apparently assigned alphabetically) tried to join in on the picking, everyone would close ranks and attack them. Ostracizing didn't work that way either, since bad/ugly/stinky or not, that person was on our side.
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I think the stable classes themselves might contribute to having less problems - even if there were quarrels and cliques in our class A (and there were, I even had a nemesis yay!), the moment someone from class B (or gods forbid C through E, since prestige was apparently assigned alphabetically) tried to join in on the picking, everyone would close ranks and attack them. Ostracizing didn't work that way either, since bad/ugly/stinky or not, that person was on our side.