Corrected entry: It doesn't make any sense that the Dean would simply replace Chang with an actual Spanish teacher. It's ridiculous to assume that they would have learned what they should have with a fake teacher, even if he was convincing. What really should have happened was what happened at the end of Season 3, where their credit was annulled and they'd have to retake the course.
Pascal's Triangle Revisited - S1-E25
Corrected entry: When the Dean is telling Jeff and Annie about the dance, you can see that the buttons on his shirt are already undone so he can more easily pull it open to show Jeff his 'all 5 dances' t-shirt underneath.
Correction: That was his intention all along. He adores Jeff and always wants to either touch or impress him, so it's nothing out of the ordinary for his character.
Debate 109 - S1-E9
Corrected entry: During the first debate, you can see the Human Being mascot in the bottom right side of the screen. When Jeff and Annie are walking out of the gym though, the Human Being is walking towards the gym. (00:09:15 - 00:10:05)
Correction: The last time we see the mascot is when they're announcing the scores. After that, the basketball team comes in and the debate is postponed. After that it cuts to Jeff and Annie walking out of the gym. However, the mascot is not walking towards the gym, he's walking down the hallway. Not only did he have plenty of time to get there, he could have simply walked out of the gym from a different exit and was heading in the opposite direction, as many other students were.
Corrected entry: During Jeff and the coach's pool game, Jeff starts off sinking bigs, then switches to smalls, then back to bigs throughout the game.
Correction: On the break a striped ("bigs") ball goes in, however we see Jeff shoot solids throughout the rest of the game. It is the coach who is shooting the striped balls, not Jeff.
Corrected entry: In the final scene, when the camera pans from Vaughn's group to follow Jeff, the statue of Luis Guzman can be seen in the background, despite not being revealed until the following episode.
Correction: The statue existed at that point in time. The absence of a cover on it does not make it a mistake.
Corrected entry: It's obvious that the coach is strict about wearing the P.E. uniform in class, but when Jeff agrees to play pool in shorts, none of the students the coach is playing pool with behind him are wearing the uniform.
Correction: The scene doesn't take place in gym class. In the P.E. Room, the pool table has a red felt, this one they play on has a green felt. They're at a student lounge (with tables, stools, and vending machines) outside of class.
Correction: This is not a plot hole. The dean hired a new Spanish teacher to assess if the class has sufficient knowledge to pass, hence the test they take. The only reason they really passed is because it is implied Pierce seduced her. Any school would at least attempt to get the students through the year without failing their language, or it would look even worse on the school.