While Jennifer Aniston played Jeannie Bueller in this spin-off, Jennifer Grey played the same character in the 1986 movie. They would later go on to play estranged friends on Friends (1994), since Aniston's character had walked away from marrying the man Grey's character would end up marrying.
Ed Rooney has Ferris' expulsion letter, drawn up by a Tibetan Monk, sitting in a safe in his office.