Continuity: Chet says he's spent the last year searching for his wife, but, when he left, Shawn was ending 7th grade and now Shawn is supposed to be sixteen

Factual error: In the episode Class Pre-Union, they were the class of 2000. In the episode Graduation, they were the class of 1998.

Continuity: The same girls keep leaving the stage every time Eric answers a question.

Continuity: When Eric answers one question, almost the entire group of girls leaves. In the next scene the stage is filled again