Mrs. Gorf was the meanest teacher in the history of Wayside School and used to teach the thirtieth story. She had the power to turn students into apples. However, after being hit by a shot she sent reflected by a mirror, she was turned into an apple.
She is an evil teacher, and is said to be the meanest there ever was. She was very strict, and if the students did anything she disliked, she'd turn them into apples.
In the TV Show, it is realized that she is responsible for Maurecia's tomboyish personality. Maurecia's pet porcupine, Fluffy, was also turned into a pineapple. Mrs. Gorf is also the reason for Maurecia's tomboyish personality today. From then on, the evil teacher was never, ever seen again. Oddly, before she turned Myron into a potato, she seemed to be inspired by Myron's rebbelion and hinted that she might be friends with him. She was defeated easily by Maurecia when she was overpowered by the transformed students.