Bart goes from villain to hero in season 8's "Grade School Confidential." After discovering Principal Skinner and Mrs.

It's been almost ten years since Edna Krabappel said goodbye ... Later, in another chapter, Bart also gives him a dedication: “We will miss you, Mrs. K”.

There was no gag when Bart spent ... really miss you Mrs. K." The note was in honor of star Marcia Wallace, who died at age 70 on Oct. 25. She had voiced bitter teacher Edna Krabappel since ...