1 Mr. Crocker (The Fairly OddParents!)
He hates children and takes great enjoyment in flunking them especially Timmy Turner.
2 Mr. Garrison (South Park)
Herbert Garrison is a recurring character in the American animated television series South Park. He is voiced by Trey Parker.
Possibly the worst cartoon teacher out there who openly insults his students and has done a lot of things that are unbecoming of a teacher.
3 Ms. Bitters (Invader ZIM)
4 Mrs. Puff (SpongeBob SquarePants)
Mrs. Puff is a fictional character appearing in the American animated television series SpongeBob SquarePants and both films based on the franchise.
5 Mr. Bolhofner (The Loud House)
6 Muriel Finster (Recess)
7 Edna Krabappel (The Simpsons)
Edna Krabappel is a fictional character from the animated television series The Simpsons, who was voiced by Marcia Wallace until her death in October 2013. She was the teacher of Bart Simpson's 4th grade class at Springfield Elementary School.
8 Peggy Hill (King of the Hill)
Margaret Joseph "Peggy" Hill is a fictional character in the American animated series King of the Hill.
She's the worst Spanish teacher ever.
9 The Gromble (Aaahh!! Real Monsters)
10 Mrs. Grimley (As Told by Ginger)
11 Mr. Lancer (Danny Phantom)
12 Ms. Zorski's Cousin (As Told By Ginger)
A high school teacher who shares the same name as Ginger's favorite teacher from Lucky Junior High who was incredibly nice and supportive of her work however unlike her cousin high school Ms. Zorski is incredibly strict and gives Ginger a really hard time for no reason and doesn't seem to liker Ginger at all.
13 Miss Hoover (The Simpsons)
She use to be a decent teacher but over time she's stopped caring about helping the students and just see teaching as nothing more then a pay check and really doesn't want to deal with the students.
14 Eleanor Butterbean (The Grim Adventures of Billy & Mandy)
15 Brenda Shoop (Clarence)
16 Mr. Goldenfold (Rick and Morty)
17 Henry Teacherman (Johnny Test)