* SugarWiki/AwesomeMusic: A prime example.
** It is a movie about [[ThePowerOfRock rock and roll]] after all, special mention goes out to [[SugarWiki/MomentOfAwesome the band's performance at the end]].
** A highlight of the soundtrack is Music/LedZeppelin's ''Immigrant Song''. Not just because its an awesome song, but the sheer fact that it's in the movie is a CMOA for the cast and crew, as they were able to convince the band (who is famously stingy about licensing their music) to let them use the song.
** Subverted with the "Heal Me, I'm Heartsick" ballad by No Vacancy. While the music is good, the singer is trying hard, and everyone looks like true rock stars... [[ReplacementScrappy Spider's]] ridiculous body-winding dance moves and leather shrug/chest tattoo combination turn the performance into one big sight gag.
* DracoInLeatherPants: People tend to ignore Patty's abuse of Ned and think of her as a DesignatedVillain. Although Dewey ''is'' mooching off Ned at the beginning, Ned only gives him an ultimatum because Patty wants it. Ned doesn't appear to have a problem with Dewey there and he only orders him to move out after he's crossed the MoralEventHorizon by impersonating him. Essentially neither Dewey nor Patty are meant to be in the right.
** Freddie is one of the most popular kids, mainly due to being TroubledButCute and getting a lot of the best lines.
** Katie the bass player in a weird way. She's noticed precisely because she's TheGenericGuy who doesn't get many lines, and doesn't get a solo in the end credits.
* FanPreferredCouple: While nothing actually happens in the movie, a lot of people like to imagine that Dewey and Ms Mullins dated after the Battle of the Bands. This is mainly brought on by the bar scene, where Dewey is able to get her to let her hair down a little.
-->'''Summer:''' ''I read about groupies. They're [[PrecisionFStrike sluts]], they sleep with the band!''
-->'''Principal Mullins:''' ''I've just been informed that all of your children are missing.'' *shrug*
** The kids feigning the terminal illness "Stick-it-to-da-man-ni-osis". That is all.
** "You are a fat loser and you have body odor!"
** Billy continuing to snipe at Dewey even after he declared the trash-talking session over.
-->'''Billy:''' You're tacky and I hate you.
-->'''Dewey:''' All right, you see me after class!
** "[[ThatCameOutWrong I have been touched by your kids]], [[MistakenForPedophile and I'm pretty sure I've touched them]]."
** "Math is a wonderful thing, Math is a really cool thing. So get off your ath, let's do some math! Math, math, math, math, maaath!"
* SugarWiki/HeartwarmingMoments: [[spoiler:The encore at the concert. ''[[PunctuatedForEmphasis School! Of! Rock! School! Of! Rock!]]'']]
** After seeing Zack berated by his father in the parking lot, Dewey initiates a class lecture/improvised song about sticking up for yourself. By the end, Zack is feeling much better and even thanks Dewey for the great lesson...in front of the other teachers (who are both awed and slightly jealous).
*** Even better when you see Zack's father cheering him on during the final performance.
* IdiotPlot: ''Any other adult'' could have potentially exposed Dewey's masquerade. Anyone with working ears could have, too. Despite the efforts to "soundproof" the room, they're playing rock music on amplified instruments for hours every day, yet no one seems to notice except one minor point wherein Mullins sits in on the class.
* RonTheDeathEater: A few people forget that Dewey is meant to be an UnsympatheticComedyProtagonist and that getting exposed is meant to be a BreakTheHaughty moment for him. The movie frequently calls Dewey out for his behavior and we're not supposed to support him until he undergoes CharacterDevelopment in the third act.
** Lawrence's outfit at the Battle of the Bands is Tetsuo from AKIRA. Just look at him.
** It's probably a reference to Rick Wakeman, who famously wore a cape during live shows in the early 70s (though his was glittery). Note that Dewey gives Lawrence a copy of Fragile, and tells him to listen to Wakeman's keyboard solo on Roundabout.
** Ned's girlfriend Patty, when you really think about it. Dewey has been bumming at their place for months if not years, while continually refusing to get a steady job and therefore doing little to contribute to the rent. Ned keeps doing whatever he can to accommodate him because they were in a band years ago, while Patty is just supposed to tolerate this. It doesn't change the fact that she seems to take joy in Dewey's suffering, but anyone would be frustrated by that point. Also, although she's annoying and a nag, she points out that Dewey committed fraud by stealing Ned's identity and then exploiting a classroom full of little kids by lying to and manipulating them.
** The fact of the matter is that most aspiring rock stars, no matter how committed they are to their dreams of music stardom, will not succeed and will have to find some other means of paying the bills. It's not because their drive wasn't strong enough, simply that at some point, RealityEnsues and you have to find a way to provide the basic necessities for yourself.
*** Of course, the movie sets up something of a FalseDichotomy -- a lot of people simply parlay their rock star dreams into another career involving music, such as teaching or writing about it. And of course[[spoiler:, at the end of the movie, Dewey and Ned do just that by setting up an after-school rock music teaching program]]. But the way Dewey acted as if it had to be either one or the other doesn't reflect reality.
** It's hard to blame Dewey's band for kicking him out -- just watch Dewey in action during the opening scene. Being a LargeHam is OK, but he should have ''known'' when to '''''tone it down''''' a little. The fact that [[spoiler:No Vacancy win the Battle of the Bands without him]] makes their point just that much stronger.
* TechnologyMarchesOn: Dewey's ruse would be harder to pull off once the rise of social media took over. A glance at Ned's Facebook would probably alert them.
* UnintentionallySympathetic: Patty's dislike of Dewey for some. It's never said whether or not Patty actually lives in the apartment too but she does admittedly have a right to be annoyed at the situation.
* ValuesDissonance: The gay jokes at Billy's expense. Wouldn't have raised many eyebrows in the early 2000s but wouldn't be allowed in the film these days. Mike White disowned the film for this reason.
** The musical doesn't necessarily fix this, but they make sure Billy's still a character and not just a walking stereotype (helps that it's on Broadway, as LGBTQ-friendly a venue as you can imagine).
* WhatDoYouMeanItsForKids: While not outright vulgar, there's a fair share of light swearing (mostly from the kids, no less!) and more than a few references to sex and drugs. Its PG-13 rating is a light one, at best.
* TheWoobie : Poor Ms. Mullins. When all the teachers are yelling at her for the Dewey debacle, she leaves the room and goes to the stairs...to put herself in the corner. Aww!