Miss Blechman

Miss Blechman was the grade-school teacher of Oscar the Grouch  (her star pupil) in episode 2159 of Sesame Street.

Because she is a Grouch teacher, her lesson plan differs from human teachers. In her class, writing your name on a blackboard 100 times is a reward in that it gives the writer a sore hand & the sound of squeaky chalk. Instead of a blackboard eraser, she uses a blackboard "dirtier". Her music class never practices learning how to play -- they only learn how to make noise.

Outside of school, she is an old friend of Uncle Wally, who once accompanied her on a miserable trip to Lake Titicaca.