'Welcome Back, Kotter' Cast: Where Are They Now?

In April 2011, "Good Morning America" reunited the cast of the 1970s hit show "Welcome Back, Kotter" that brought catchphrases to classrooms coast-to-coast and catapulted the sweathogs, remedial students in Mr. Kotter's high school class, into millions of young hearts. (Heidi Gutman/ABC )