Hea of the Class is an American sitcom that ran from 1986 to 1991 on the ABC television network. It followed a group of gifted students in the Individualized Honors Program (IHP) at the fictional Monroe High School (later Millard Fillmore High School) in Manhattan, and their history teacher Charlie Moore (Howard Hesseman). Hesseman left the series in 1990 and was replaced by Billy Connolly (in his first major American production) as teacher Billy MacGregor for the final season.