I like the Classroom series
I haven't played enough of it to know whether it's better or worse than the earlier ones. So far, I'm at act 3, and nothing really original has popped up. I like the hallwalka scene, but it should have had a teacher on patrol.
Also, I observed a serious bug: a runaway desaturation effect. It takes hold quite early in the game, in one of the cutscenes or transitions I think. Yipes!