Other mistake: There are no wires going to the phone booths in the town of Cheerful. (00:18:00)
Continuity mistake: Charlie's tie at the start of his first day as teacher is green, beige and white, but at noon when the Sheriff comes in to check on him, his tie is now white, brown and yellow in an entirely different striped pattern. After school the original tie is back on. (00:31:00 - 00:37:00)
