Ed Asner character has a large wooden "T" hanging on his wall, very similar to the large wooden "M" that hung on his former costar's apartment wall in the show on which they both starred "Mary Tyler Moore." The only difference being that the "T" stood for Texas whereas the "M" was for Mary.
Madison's locker is on the top row. She is not tall enough to see the combination lock.
Ed Asner also starred with Lily Tomlin in the episode titled The Ghosts Who Stole Christmas of the X-Files.