The teacher is a new teacher that I made up, her name is Professor Dumbridge (get it?)
Dumbridge: Well, look here! I bunch of eager little faces. Oh I know what you say behind my back. Professor Dumbridge is as dumb as a bridge. Well let's see how smart you are!
Rhodes: Well, actually, nobody ever says-
Dumbridge:SILENCE!! 30 points for Slytherin, take away 30 points from Gryffindor.
Daniella: Hey, that's not fair he-
Dumbridge: SHUT UP! 20 POINTS FROM HUFFLEPUFF.
Draco: Proffesor Dumbridge, you're the best!
Dumbridge: 20 points for Slytherin! Now let's get this lesson started. 10 points from Ravenclaw.