Step 1 : Introduction to the question "Which TV show featured a high-school teacher with a group of unruly students called the Sweathogs?"
...Welcome Back, Kotter is an American sitcom starring Gabe Kaplan as a sardonic high school teacher in charge of a racially and ethnically diverse remedial class called the "Sweathogs". Recorded in front of a live studio audience, it originally aired on ABC from September 9, 1975, to May 17, 1979. Though it lasted a mere four seasons, the series marked the beginning of John Travolta's career, and spawned boatloads of merchandise. There were action figures, lunch boxes, comic books, board games and more. The Sweathogs were household names. Especially John Travolta.