When the Evil Ice Cream Man and Dobbs are fighting at the junkyard, in one angle, Dobbs' tie is thrown over his shoulder by the Evil Ice Cream Man and in the next view, it is back down. In the next shot, it is back up over his shoulder again. However, in-between moments, Dobbs could have simply put it down, then back up as the Evil Ice Cream Man was stomping.
When Max walks out of the assembly room with trash all over him, Robe grabs a single noodle from Max's ear. In the next shot it can be seen that Robe has many noodles wrapped around his fingers.
When the football players are seen holding their sousaphones during the marching band sequence, they are holding them correctly.
When the globe is first seen, the ring that is holding it is facing to the right. When Max climbs onto the social studies teacher's desk, the ring is now facing to the left. When Max kicks the globe, the ring is facing to the right again.
When Max is telling Robe and Megan that he's moving to Chicago, Robe says that they call Chicago the Motor City, because of carjackers. This is incorrect. However, while it could be true about carjackers stealing cars, Chicago is not the Motor City. Detroit is actually the Motor City and Chicago is the Windy City.
Greg Lewis is credited as Janitor, but on his nameplate stands Anthony.
The song that is being played at the milkshake party contains a sample of Young MC's "Bust a Move". However, the music credits do not mention this.
In band, Jenna's chair is marked "1st Chair". An ensemble that has chair placements must hold auditions for chair placements either during or before the first week of classes.
The bulldozer in the film is not a bulldozer, but a John Deere 444H front end wheel loader. A bulldozer has a straight pushing blade and usually caterpillar tracks.
Reflections are visible in the camera lens.
When Principal Jindraike says "Attention, students!" before giving his speech about Max instigating crimes against the school, the camera shakes.
After Max cuts the cord to the social studies teacher's telephone, there are no wires visible from the cord attached to the telephone.
The globe is able to be kicked despite it being secured in earlier shots.
Troy McGinty is a high school student. While most junior high schools have eighth grade as their highest grade, some schools have ninth grade as their highest grade. However, since his report card was shown as ninth grade, he is a sophomore and therefore should not be at the same school as Max.
When Max says, "What are we doing?", his mouth doesn't match the words.
In the beginning, during Max's dream when the Evil Ice Cream Man shoots Tony Hawk with ice cream, he says, "Mmm! A Tony Hawk sundae!", but his lips stopped moving before "sundae".
When the football players are seen playing the tubas and sousaphone in the band room, some of the notes that are played require valves to be pressed down, but no valves are pressed down.
Megan states that Chicago is 1,000 miles away. Given that the location of the school is in Pasadena, Chicago would be 2,007 miles away, and it would take 30 hours to get there by car.
On Max's first day of school, he gets to school by bus. After school, he walks from the school to the Animal Shelter. After he is done visiting the animals and trainers at the animal shelter, Max is seen biking home. It seems strange that he has his bike with him if he took the bus to school, then decided to walk home after the animal shelter visit. It is never explained how he suddenly got his bike to school and the animal shelter if he took the bus to school.
When Jenna invites Max to the party at the Cafe for milkshakes she tells him it's 9th graders only aside from Max but Lil Romeo is there and is in Max's grade as well.
When talking to Max about horseplay and malarkey, Principal Jindraike tells him that ex-courage is the opposite of encourage. Discourage is the opposite of encourage, not ex-courage. Ex-courage is a word that Principal Jindraike made up.
Despite being given an essay assignment from the social studies teacher, Max is never seen writing his assigned essay.
Before Troy throws Max into the mud, a picture is taken, which would make a hilarious article, except the camera lens cap is on.
Despite Max being a bassoonist, he is never seen playing the bassoon.