Continuity mistake: When TJ makes the morning announcements, in the first scene of the classroom we see a boy in a blue hat sitting in the back row. After TJ says that the kids can refuse to answer a teacher, the same kid is suddenly sitting in the second row so he can slap hands with someone in the first row.
Factual error: In the beginning, when everything on the playground is swamped out, there is a see-saw in the front of the playground doors. It is never ever seen again in an episode of Recess. For example, in "The Great Jungle Gym Standoff", Ms. Finster comes out those doors and asks T.J. what he is doing.
Continuity mistake: When TJ announces that there will be no gum sharing, it shows Gretchen in the classroom. There is a kid sitting behind her. However, this is the same kid who is caught running in the hall, who Ms. Lemon says is a sixth grader. The gang is in fourth grade.