Ms. Cantwell

Ms. Cantwell is lisas new subsitute teacher and the main antagonist in the episode  Black eyed Please

Ms. Cantwell becomes Lisa's substitute teacher who does not warm to Lisa for some mysterious reason and bullies her and gives Lisa a "B" and Ralph an "A". After Lisa has a reading kangaroo with a bunch of little joeys in it for the books Ms. Cantwell takes the joeys out and puts them in other kangaroos.