What is the name of SpongeBob's driving teacher?

SpongeBob’s driving teacher is Mrs. Puff.

Mrs. Puff is an anthropomorphic pufferfish who runs the Boating School in Bikini Bottom. Students drive boats as though they were cars, making her school the series’ underwater version of driver education. SpongeBob is her most dedicated student, but his panic and reckless driving repeatedly cause crashes.

The character was created by series creator Stephen Hillenburg after Nickelodeon executives wanted SpongeBob placed in a school. Hillenburg wanted SpongeBob to remain an adult, so he developed Mrs. Puff as a boat-driving instructor rather than making SpongeBob a child in a conventional school.

Mrs. Puff’s pufferfish biology is part of the joke: she inflates when frightened or injured, functioning visually like a car airbag. Another running gag is that SpongeBob never permanently passes her course, while Mrs. Puff is often arrested or blamed for the destruction caused during his tests. The character is voiced by Mary Jo Catlett.