Poor Breakdown. He takes a lot of crap, almost as much as Aiden. But... I don't think he'll be taking it anymore after this.
He looks silly in that tiny desk, though.
The Super University, you may have figured out, is just a repurposed "X-Mansion," or, rather, a repurposed Raven Institute as suggested by Jason. But I can't help to sometimes draw things the way I remember them from my highschool, like those desks, for example. While they were fine for us, they'd be considerably less so for a large person like Breakdown.
I haven't drawn Trash sitting at a desk yet. It would be physically impossible. He probably just sits on the crushed remnants of a desk in every class.