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.

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])

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.

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: When Dewey is eating a sandwich from one of the girls, the Saran Wrap around the sandwich changes between shots.

Continuity: At the title sequence, after Dewey's solo, and just before he stage-dives, the camera cuts from him, to the lead guitarist, then back to him. In the first shot of him, he is just putting down his guitar. In the shot of the lead guitarist, the neck of the guitar is visible as if he was still holding and playing it, but when it cuts back to Dewey, the guitar has been put down, and Dewey has his shirt off.

Audio problem: Right before Dewey walks into the classroom for the first time, he tells the principal, "check." The shot changes to behind Dewey's head and we can see him saying "check" again.

Continuity: At the beginning when Dewey gets kicked out of the band, he picks up his guitar case and raises it above his head. In the very next shot, from behind, the guitar case is suddenly down by his side.

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.

Continuity: In the scene where Dewey tells the class that he is going to be singing and playing guitar, "braceface" says something like "Why are you in the band?" and the shot is of her back with her right arm behind her chair, but when the shot changes so you see the front of her, her arm is in front of her chair on the desk. This happens several times.

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: As Ms. Mullins says, "You know, it's more complicated than that" she brings her right hand up above her shoulders, but in the next shot, her hand is lower. Submitted by Blibbetyblip

Continuity: As Zach finishes singing the song he wrote, he has both his hands on the guitar, but in the next shot, his left hand is on his thigh. Submitted by Blibbetyblip

Continuity: As Zach is 'raising his goblet of rock', his hand gets a lot lower in a shot change. Submitted by Blibbetyblip

Audio problem: Right after the part where the principal and Dewey are having a few beers they are coming home. Dewey starts singing and snapping but, if you look in the car while they are driving into the parking lot, you can see that he is neither snapping nor singing. Submitted by Movieman123

Audio problem: After Dewey and Miss Mullins go to the bar, Dewey is heard singing and snapping his fingers as he drives. However, you can see through the windshield that both of his hands are on the steering wheel and he is not snapping his fingers.

Continuity: When Billy gives Dewey the paper bag with his clothes in it, towards the end of the film, the way the bag is folded at the top changes between shots.

Continuity: As Dewey says "You hate teachers, is that what you're about?", the black bespectacled girl has her hand on the table, but in the next shot, her arms are crossed. Submitted by Blibbetyblip

Factual error: At the "Battle of the Bands" scene, the kids arrive and have less than the length of one song to get ready to go on stage. (We see the band up on stage and hear the Battle of the Bands person tell the kids they're going on after that band.) Yet, when they get up on stage, they've got outfits, hair, makeup - including fancy braids and spikes - that just plain couldn't have been thrown together in five minutes.

Continuity: When Dewey is getting the stuff out the van after he subs the kids' music class, there is a brief shot of the back as he removes the guitars and the keyboard isn't visible. However two shots later he gets it out out of his van.