At the beginning, Dewey Finn takes his shirt off right before performing a stage dive.

Brief scene of a band member trying to flirt with the school principal, calling her "hot".

Dewey Finn jokingly informs the children (the night before the battle of the bands contest) that they should not have late-night parties, be drinking tequila and trying to "get lucky".

Dewey makes a comment about how he's been (emotionally) touched by the kids and that he thinks he's "touched them", which the parents are implied interpret as him saying he's molested their children. Young children will not get this joke.

After being assigned "groupie" by Dewey, Summer later confronts him about this, saying that, rather than being "cheerleaders", that "groupies" are sluts that sleep with the band.

Although this is never acted upon, Dewey Finn informs Miss Mullins on his first day as a substitute that in case a student steps out of line, he has no problem "smackin' him in the head".

During the parents' night, Dewey Finn mistakenly says he could be "dismembered" (he means "fired") while making excuses why he can't inform the parents what he has been doing with their children.

During an argument before the encore in the battle of the bands contest, a girl threatens to shove drumsticks down a boy's throat in case he touches another boy.

When he is informed that his band can't compete in the battle of the bands contest, Dewey becomes frustrated and throws a chair, while Summer jumps as a reaction.

The children's teacher Miss Dunham has broken her leg by slipping in the bathroom. This is not shown, but is only mentioned by Principal Mullins as having happened.

Dewey Finn takes a stage dive during a concert and lands on the floor, passing out.

1 use of "slut", 6 uses of ass, 2 uses of damn, 2 uses of hell, 1 use of "pissed off", 1 use of "screwed", 2 uses of "sucks", 1 use of "crap", and 6 religious exclamations. In one scene, the word "bitch" is mouthed, but is impossible to hear.

A character holds his hand with the back of his hand facing towards another character and tells him to "read between the lines" implying the rude middle finger gesture although this joke is quite subtle.

Dewey Finn has his class hurl insults at him to teach them how to "break the rules and get mad at the man." One of the girls tells him "get out of here, stupid ass!"

While singing the improvisational lyric "-get off your ath, let's do some math", Dewey replaces the word "ass" with "ath" in order to rhyme the verse. Given the context, it sounds very much like he is saying "ass".

One mouthed "bitch"; it's impossible to hear, but it comes up in the subtitles (whether watching on DVD or Blu-ray and you have them on).

Some adult characters are seen smoking, and a child thinks they are cool.

Crack is said in the movie. A type of drug is named. There are people in a van smoking. At a nightclub there is people drinking while the band is performing

A teacher tells Dewey about how the principal got drunk at an alumni dinner in the past.

Dewey and Miss Mullins go to a bar where they drink large mugs of beer.

Dewey Finn mentions to the class on his first day as a substitute that he has a hangover. He asks if any of the students know what that means and one says he thinks it means Dewey is drunk, to which he replies "it means I was drunk yesterday!"

Another scene, after being confronted with complaints from one teacher hearing music coming from another character's classroom, the other character states to the class that "Uh-oh. You know what that means? She must be doing crack."

Dewey Finn jokingly informs the children (the night before the battle of the bands contest) that they should not have late-night parties, be drinking tequila and trying to "get lucky".

Miss Mullins is seen reprimanding a little girl who has been sent to her office. We see Miss Mullins speaking firmly, the girl crying, and then screaming when Miss Mullins offers her a hug. The girl is then excused.

A brief scene of a father discipling his son in a somewhat aggressive manner.