Mrs. Drone

Mrs. Bofini (also known as Mrs. Drone) was a past substitute teacher for Mr. Ratburn's class. The class disliked her, because she had the habit of chewing an apple with her mouth open in front of the class, plus talk while she was eating, and blinking her eyes. During the flashback, she told Mr. Ratburn's students to spell the word "leather", but her habits distracted them from spelling. She was ranked #2 of the worst substitute teachers behind Ms. Tremello, according to Arthur and his friends.

She also appeared and spoke in a flashback in the episode "Kids are from Earth, Parents are from Pluto," named Mrs. Drone. The flashback takes place one year before the episode, during the previous parents' open house. She shows a slide show about a trip to the forest, and Oliver Frensky falls asleep during it. In this appearance, it appears that she was one of the regular second grade teachers, as opposed to a substitute like her first appearance.