Edna Krabappel is Bart's fourth grade teacher on the show The Simpsons.  Edna is voiced by Marcia Wallace and is portrayed as a lonely divorcee.  She previously dated Skinner, but now mostly will throw herself at anything that's remotely willing.

Edna Krabappel Quotes

Bart: Boys and girls, Mrs. Krabappel, I come before you today to solve a riddle that has plagued mankind for centuries: What has four legs and ticks?
Milhouse: A walking clock?
Nelson: A walking clock!
Martin: I'd wager he has some variety of walking clock in that box!
Edna: Bart, is it a walking clock?
Bart: What?.....No, it's my dog.

Now, I don't want you to worry class. These tests will have no affect on your grades. They merely determine your future social status and financial success. If any.

Mrs. Krabappel

The Simpsons Quotes

Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side!
Man: (From inside a bathroom stall.) That's a right triangle, you idiot!
Homer: D'oh!

Wow, now I see why they call you Miss Hoover. You must have been vacuuming for an hour.

Bart