Continuity mistake: As Dexter is driving back from Marshfield after picking up the computer part, he is trying to figure out answers to a sample test. There is obviously a window on the driver's side - there is a reflection in it, and he has also taped several pieces of paper to it. When he arrives at Medfield, he climbs out the side of his dune buggy, indicating that there is no window.
Other mistake: A group of students poses as painters so they can investigate shady doings at A.J. Arno's home. They had made a work order which included their dormitory's phone number. When Arno calls the number, he asks, "Is this 247-8824?" A student says "Yes" but the number on the phone dial is "471249624."
Continuity mistake: Professor Quigley shows his students a grocery list, and then demonstrates how a computer can be used to make a phone call to the grocer's and place the order by playing a recorded message. However, the grocery items named on the recording do not match the items on the list.
