Continuity mistake: When Janice gets mad at the class when they don't believe she has a poltergeist, she puts her books and a pencil on the desk. The pencil is seen rolling off the desk, the next shot the pencil is back on the desk. At the end of the scene the pencil is back on the floor.
Head of the Class (1986)
1 mistake in Poltergeist III
Starring: Robin Givens, Dan Frischman, Jeannetta Arnette, William G. Schilling
Genres: Comedy
Question: Did they ever show Mr. Moore teaching another class? Surely he had more than one class a day.