Bart gets Mrs. Krabappel fired after she confiscates the class's cell phones, but soon starts to feel guilty when a hip, new teacher is hired in her place and Mrs. Krabappel gets a job at a muffin store thanks to a self-help book.

!! Tropes:

* BigNo: Bart when he learned how many competitors Mrs. Krabappel had during her job running a muffin store.