Mrs. Krabappel

Edna Krabappel is the third non-premium School Workers character, and the first and only teacher for Springfield Elementary. She has no voice actor.

Simpsons Wiki Description
Edna Flanders (née Krabappel), is a 4th Grade teacher at Springfield Elementary School. Edna Krabappel lives at 82 Evergreen Terrace and later 744 Evergreen Terrace. Outside school Edna is portrayed as a typical mid-life single adult, heavy smoker and occasional solitary drinker trying to find the right man. She had numerous affairs with many Springfieldians, her reoccurring choice always being Principal Skinner, usually out of pity rather than affection. Since the 23rd Season, Edna is married to Ned Flanders.


 * Read the full article here at Simpsons Wiki.