From Mrs. Krabappel on "The Simpsons" to Mr. Kotter from "Welcome Back Kotter," check out some of the most memorable TV teachers.
Mr. Kotter from "Welcome Back Kotter," played by Gabe Kaplan
Department of Defense
From Scott Gries/Comedy Central
Rob Carr/Getty Images
Sony Pictures Television
Jamie Urqhart/River Dee Trust
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