'hard to see what the argument for including disruptive pupils is'
rather depends on your viewpoint
really, why keep them alive at all? what's the point? isn't there some sort of uninhabited island they could be shipped to?
when they're in separate schools, what about the ones who are more disruptive than others? do they get sent to separate separate schools?
what about, say, a child who swears and breaks stuff, but never hits another person, compared to a child who never ever swears, but frequently hits out under stress? will there be different schools for each one?
and what if my teacher's pet of a ds, the sort of child anyone would like to sit next to, reacts to his father's depression and has a bout of disruptive behaviour? how many incidents would it take before he was off to the school for 'the others?'