Edna Krabappel, commonly known as Ms. Krabappel, is a fictional character from the popular American animated sitcom 'The Simpsons'. She is voiced by actress Marcia Wallace and first appeared in the show's second season in 1990. Ms. Krabappel is a fourth grade teacher at Springfield Elementary School, where she teaches Bart Simpson's class. She is known for her sarcastic wit and often finds herself in humorous situations with her students.