Ore-sama Teacher

Kurosaki Mafuyu, an ex-delinquent who was expelled from her school, tries to find a new life in a new school. She's so happy that it is a chance that she can live as a normal girl. However, it turns out her childhood friend (who taught her how to fight) also goes to that school... as a teacher. Once again she has to stand up and fight for her friends (although at first she is reluctant to do so).

Tropes used in Ore-sama Teacher include:

Action Girl - Mafuyu
Bifauxnen - Mafuyu as Natsuo. And Mafuyu 9 out of 10 times when she's not in her school uniform. Her clothes are so baggy they even fit Saeki!
Book Dumb - A great part of the cast. Subverted with Hayasaka who seems dumb in a lot of ways but actually pays attention at school. Mafuyu remarks on how meticulous his notes are or how there are no doodles in his school books.
- Actually Mafuyu may take the cake in the dumb department. She's extremely proud of only having one notebookfor all her subjects. Subverted, because Yui finds a way for Mafuyu to learn things very fast exactly because her head is completely empty.
Breaking the Fellowship - Volume 6.
Brick Joke - Several. Including the time Mafuyu and Hayasaka went to look for Okegawa (the school's 'banchou') in the Old School Building. They see a few cockroaches and Mafuyu instinctively squishes them with the closest possible object she could reach, which happens to be Okegawa's school bag that had been lying on the floor. In a later scene the two are face to face with Okegawa who is incidentally carrying his bag with him and they can't help staring at it. Naturally Okegawa thinks they are staring at something else.
Bruce Wayne Held Hostage - Mafuyu's status as a weak mascot girl causes this sometimes. In one, oddly subverted case Natsuo (her Secret Identity) has to escape the kidnappers to save Hayasaka who has run off to save her.
Bruiser with a Soft Center - Banchou. Probably the first and only person to cry over a Nekomata movie. His pen name is Strawberry Love for god's sake!
Cast Full of Pretty Boys - Until the appearance of the student council this manga had a total of one female character who sometimes does not even register as a girl.
Chaste Hero - Basically everyone in the main cast excluding Saeki. They are too focused on fighting to understand normal high school stuff like going to karaoke, so naturally romance is out of their league. Hayasaka’s feelings for Usa-chan may or may not be love and just a childish admiration, but Shinobu is a perfect example as he is too dense to notice certain person’s feelings for him.
Chekhov's Gun The fortune Okegawa got in the New Year's chapter that warned him about not being late (very subtle, one needs to look closely to decipher it). In chapter 66 he is conveniently being held back a grade because he was late for his exam.
Crouching Moron, Hidden Badass
Cry Cute - Kangawa. OMFG, Kangawa. A rather unexpected, nosebleed-inducing sight.
Cute Bruiser - Mafuyu
Dumb Blonde - Both played straight and averted with Haysaka who is 'dumb' in many ways but not Book Dumb. Bonus points for being recognized as a Japanese Delinquents immeditately by everyone because of his hair color.
Everyone Knows Morse - Mafuyu and Banchou.
Expository Hairstyle Change - In contrast to her gang leader/ yankee days where she had dyed long blond hair present time Mafuyu sports a short cut and her natural(?) hair color.
Forgotten Childhood Friend - Mafuyu and Saeki/Takaomi.
Highly-Visible Ninja - Yui Shinobu.
Hot-Blooded - Hayasaka in particular. He just loves to fight and Mafuyu/Natsuo has to use shounen manga style power diagramms to get him to learn how to dodge in a fight (he never used to dodge his opponents hits because he considered this to be cowardly).
I Just Want to Have Friends - Mafuyu. She wants to be a girly girl and have actual female friends since she only used to hang around guys during her time as banchou. (No girl would dare to come close to her.) This results in a total misconception on her side on how girls act and she ususually ends up seeming like a Casanova Wannabe when trying to approach girls. Needless to say, all her tries to obtain female friends fail horribly. Unless you count in Okegawa/Banchou. The corniness totally works on him.
Handsome Lech - Hinted strongly that Saeki is one. Mafuyu wonders why she has seen several beautiful women leaving Saeki’s apartment in the morning. His answer to her inquire: an arrogant smile.
Huge Guy, Tiny Girl - Everyone is at least one head if not two heads taller than Mafuyu.
In-Series Nickname - Morse girl (Banchou->Mafuyu). Banchou for Okegawa (even after he gets beaten by Mafuyu and stops being the actual banchou).
I Was Beaten by a Girl - Seeing how devasted Okegawa/Banchou was at getting beaten by a smaller guy Mafuyu suspects he would be even more devastated if he found out that it was in fact a girl that took his position as Banchou from him.
Japanese Delinquents - The cast is full of them. Pretty much everyone either used to be a delinquent, is a delinquent or is trying to quit being a delinquent.
Lethal Chef - Saeki.
Lonely Rich Kid - Hayasaka is hinted to be this.
Masculine Girl, Feminine Boy
Mistaken for Gay - Natsuo AKA Mafuyu. Poor Hayasaka.
Mugging the Monster - Saeki invokes this whenever he wants to.
No Name Given - After 9 volumes Hayasaka still has no first name and nobody has even so much as remarked upon it so far. There are hints that he might have an Embarrassing First Name.
Official Couple - One so far Ookubo and Minato, Kangawa's sister.
One-Note Cook - Just like Saeki, Mafuyu can not cook. But as the series progresses she learns how to do cup noodles!
Paper-Thin Disguise - Played straight and lampshaded quite often with Mafuyu's 'Usa-chan man' mask and her Natsuo disguise. Also when Mafuyu does not have her mask with her and tries to mask herself by wearing her t-shirt over her head (unfortunately it has her name on it) or wearing her wallet chain and a pack of tissues as an eyepatch over one eye.
Pint-Sized Powerhouse - Mafuyu.
Princely Young Man - Miyabi, who is undoubtedly a Yamato Nadeshiko type.
Rummage Sale Reject - Some of Mafuyu's and Banchou's fashion choices.
Secret Identity - Mafuyu has two.
Sensitive Guy and Manly Man - Subverted with Mafuyu and Banchou. Both are incredibly strong but Bachou'a all soft at the center. He even keeps imagining her as his prince
Shrouded in Myth - Hayasaka and Okegawa’s view of the previous gang leader of Higashi High, Mafuyu, is so messed up that they mistake her gender, and that’s one of the lesser wrong assumptions they make. All thanks to Maizono.
Sweet Polly Oliver - Mafuyu as Natsuo
Tall, Dark and Handsome - Takaomi, Okegawa, Ookubo...the list goes on. Even Arisugawa the cat-eared tsundere maid guy fits the description.
The Bet - Takaomi bets 5 years of salary that he can double the number of applicants to the school within 3 years. The real reason and reward for the bet between Takaomi and the principal are not revealed until volume 7.
The Chessmaster - Miyabi & his father. Kousaka tries to be this, but fails miserably. May also apply to Takaomi.
The Mole - Shinobu, who is Becoming the Mask.
Tomboy - Mafuyu all the way. She's sometimes seems more like an actual guy than a tomboy.
Too Kinky to Torture - Maizono. When he got caught by a rival gang he asked them to tie him up extra tight.
Unwanted Harem - Lampshaded (by Yui) but completely avoided so far despite there being only one girl in the main cast in the first few volumes.
Wholesome Crossdresser - Sakurada. Even Mafuyu admits he's cute. Poor Aoi even falls for "her"...