Other: After the concert, when Dewey is telling Gordon how awesome the lights were, one of the girls behind him calls him Jack. The actor that plays Dewey is Jack Black. (This mistake is mentioned in the Kids Kommentary. [sic])

Continuity: During the scene where the kids are saying their version of the Pledge of Allegiance, the camera zooms in on a blonde girl. From shot to shot, which hand she has over her heart changes.

Continuity: When Dewey is writing his name on the board, he begins writing and then erases the end to leave "Mr. S". In the next shot that shows the board, it still says "Mr. S" but it is in different writing.

Continuity: After the kid's music class and Jack Black yells "You." to Zack, you see the kids around him sit down twice between shots.

Continuity: In the scene where Dewey and Ms. Mullins are in the bar, the shots from behind Ms. Mullins sitting down show that her left hand is on the table. However, the shots showing the front of Ms. Mullins show her arms folded.

Revealing: In the middle of the scene where it shows what the class does throughout the week, Dewey is shown playing a bass guitar with no strings.