Mrs. Krabappel

Edna Krabappel
The Simpsons character
Information
Voiced by	Marcia Wallace
Gender	Female
Occupation	Fourth grade teacher at Springfield Elementary School
Relatives	Ex-husband: Mr. Krabappel Husband: Ned Flanders Step-sons: Rod and Todd
First appearance
The Simpsons	"Bart the Genius" (January 1990)

Edna Krabappel-Flanders /krəˈbɑːpəl/ is a cartoon character from the animated television series The Simpsons, who was voiced by Marcia Wallace until her death in 2013. She is the teacher of Bart Simpson's 4th grade class at Springfield Elementary School, and Ned Flanders's wife in later seasons.

Krabappel is the only character that Wallace voiced on a regular basis. Following Wallace's death, the show's producers announced their intention to retire the character. Episodes featuring Edna since then have been small no-dialogue cameos, until the epilogue (which includes Wallace's voice) of the 25th season episode "The Man Who Grew Too Much".

Edna Krabappel holds a Master's from Bryn Mawr College. She is a grumpy and jaded caricature of the American public school system. In "The Seemingly Never-Ending Story", it is revealed that she was once a very optimistic woman who genuinely wanted to help people in need. It would seem that after years of frustration thanks to the school, and Bart Simpson in particular, this wore away.

There is some inconsistency about Edna's origins. She is said to have come to Springfield to begin teaching in "The Seemingly Never-Ending Story". However, in a case of retconning, she can be seen in "Springfield Up" as a student running through the background at Springfield High School while a young Chief Wiggum is filmed carrying out his duties as a hall monitor, as part of the documentary featured in that episode.

...
Wikipedia