Who said "School is where I teach real lessons."?

This quote is attributed to Nelson Muntz.

School is where I teach real lessons. - Nelson Muntz

"School is where I teach real lessons."

Nelson Muntz Education

"Ha-ha!"

"Your tears of unfathomable sadness!"

"I'm gonna enjoy this, Bart. I'm gonna enjoy this a lot."

"Eat my shorts, Simpson!"

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."