John Adams High is a high school in which many of the characters went to from seasons 2 to 6. Eric graduated in season 3, as well as many others in season 5. Also, John Adams High had a limited faculty, where one teacher has many of the same students.
Only one set is used to represent the halls of the school. In season 5, the 'senior floor' is used by turning the set sideways. Cory and Shawn express fear over the 'other side' of the school, in the direction of the camera, saying that "you go over there, you might never come back."
- Ms. Bimbaum, biology teacher
- Janitor Bud, janitor/Feeny's secretary
- Devon Collins, guidance counselor
- Mr. Dubin, health teacher
- George Feeny, principal/teacher
- Coach Franklin, coach
- Chet Hunter, janitor
- Miss Kelly, substitute health teacher
- Dr. Sorrell, science teacher
- Katherine Tompkins, teacher
- Jonathan Turner, English teacher
- Bertha Van Bulow, lunch room lady
- Miss Valentine, subsitute teacher
- Eli Williams, media arts teacher
Season 5 Graduates
- Frankie Stecchino
- Joey Epstein
- Erica Jackson
- Phyllis Nakamura
- Myra Zinkermane
- William Daniels played John Adams in the film 1776.
- The school starts off as a grades 7-12 high school, as first seen in the second season, to a strictly grades 9-12 high school in later seasons