Character mistake: As Eddie Haskell and Lumpy Rutherford return from the washroom to Mr. Gannon's history class, Mr. Gannon calls Eddie "Louis."
Character mistake: When Gilbert and Beaver are talking to their English teacher in the classroom, the teacher addresses them as Mr. Cleaver and Mr. Harris (as opposed to Mr. Bates). This same name discrepancy is referenced on this site in another episode.