[[quoteright:243:[[Manga/TheLawOfUeki http://static.tvtropes.org/pmwiki/pub/images/kobasen_badassteacher.jpg]]]]
[[caption-width-right:243:[-Detention? You'd be getting off ''easy''.-] ]]

->'''[[TheHeroine Serah]]''': This has gone too far. *clears throat* ''THAT'S ENOUGH''! I've about had it with your mischief! You should be ashamed of yourselves for behaving like this. You should know better! Well, what you have to say for yourselves?
->'''[[BlobMonster Flans]]''': ...
->'''Noel''': [[DeadpanSnarker I don't think a good scolding is going to solve anything]].
->'''[[TeamPet Moogle]]''': ... They said they won't do it again, kupo.
->'''Noel''': Huh? No way?
->'''Moogle''': They also said, "[[HorrifyingTheHorror She's scary! We don't want her to get mad at us again, so we'll be good from now on]]", kupo.
->'''Serah''': Alright, that's a promise. Now, it's time for all of you to go home!
-> *[[CrowningMomentOfFunny The Flans all leave]]*
->'''Noel (as narration)''': ''It was then that I remembered that Serah was a teacher back on New Bodhum, and the kids called her Meanie Miss Farron. I'd completely forget about that 'til now. I'll bet she was one of those teachers who [[BewareTheNiceOnes were nice to you when you were good, but could scare you when you weren't]].''
-->-- ''VideoGame/FinalFantasyXIII2''

Sometimes you have a teacher who is not a [[SadistTeacher sadist]], particularly [[SternTeacher strict]], or overly [[MisplacedKindergartenTeacher nice]]. They are just a regular teacher. [[BerserkButton Until you threaten their students]]. After that you might want to start praying to whatever god is out there for mercy. You ''do not'' mess with their students. Getting away with just a lecture is not an option. Detention, even less. And don't even think about getting off with a warning. These are the teachers that make you wish they'd leave discipline up to the principal.

A SadistTeacher wants their students to suffer. A BadassTeacher wants those who make their students suffer to suffer.

Usually they're the NonActionGuy (or Girl) type, or a {{Nerd}}. Often they're well-respected and popular with their students (though this isn't always the case). This is also common with [[EvilTeacher Evil Teachers]] who actually [[BecomingTheMask like their day job]]. [[OldMaster Anyone who runs a martial arts school]] is almost certainly also this trope, since their entire day job is teaching students how to be fight anyway.

If a HippieTeacher or a MisplacedKindergartenTeacher is prone to this, [[BewareTheNiceOnes running away as fast as possible is probably a good idea.]]

Usually not TruthInTelevision, as any real teacher who behaved this way would in most cases stop being a BadassTeacher and start being a FiredTeacher.

For the parenting equivalents, see MamaBear and PapaWolf. For an older sibling who acts like this, see KnightTemplarBigBrother. Can overlap with BewareTheNiceOnes, and occasionally BadassNormal in worlds with Supers. For a similar character, see BadassBureaucrat. Contrast SadistTeacher.
----
!!Examples:

[[foldercontrol]]

[[folder:Anime & Manga]]
* Yoko Littner from ''TengenToppaGurrenLagann'' may be the queen of this trope, managing to defeat two [[HumongousMecha Ganmen]] with just her rifle and a hoverbike in order to protect her students.
-->"[[PreAsskickingOneLiner This will be on the test, so remember well]]. Don't wreck people's houses! ''([[CrowningMomentOfAwesome strafes a Ganmen with over a dozen shots]])'' Don't take children hostage! ''(dodges the other Ganmen's attack)'' Don't threaten people with force! ''(finishes off the second Ganmen)'' That's it. Class dismissed. ''(DramaticGunCock, the Ganmens explode)'' You fail!"
* Onizuka from ''GreatTeacherOnizuka'' is the epitome of this. The guy took multiple gun shots to save a girl that's been slandering him and threatening his job, dived off a building multiple times to save students, biked through a building with an impending explosion, ''forced'' a student to give up her death wish, and destroyed multiple gangs.
** Granted, he's done ''insane'' things to his students (forcing bullies through rather extreme humiliation, for example), but only to teach a lesson to help them survive in the world (Picking on people is wrong, not just morally but also because those people [[BewareTheNiceOnes sometimes get pushed too far and do much worse to you]]).
** If there's a questionable trait here it's "Teacher". Onizuka is a badass who has decided to start teaching to repay society for all the bad things he has done. He's not very good at teaching but he tries.
*** Well, only with actual school material, really. He states once or twice that what he really tries to do is make school fun enough that his students actually enjoy coming for school, often to the point of staying hours after the last bell rang. Since he's terrible with the actual material (that he's supposed to be teaching), he works at something that he's actually capable of instilling. And he succeeds.
** Not to mention what happened in the final few chapters - [[spoiler:upon mention that the new headmistress has trapped herself inside of the highschool and set the building ablaze, Onizuka - who was moments earlier pronounced dead - sneaks out of the hospital, steals a motorcycle from a biker gang member waiting outside of the hospital, rides said motorcycle into the burning school building, grabs the headmistress, and proceeds to ride out of a ''fourth story window'' with a maniacal grin on his face LikeABadassOutOfHell.]]
** The same author wrote a manga called ''Kamen Teacher'', which is implied to take place in the same universe as ''GTO'', and focuses on a teacher who dons a ''Series/KamenRider''-style mask in order to whip his class of delinquents into shape.
* ''Manga/AssassinationClassroom'' features Koro-sensei, a nonhuman teacher badass enough to destroy most of the moon, turning it into a permanent crescent, capable of moving at Mach 20, temporarily cloning himself to teach his students individually at once, and immune to all weaponry besides a specific form of AppliedPhlebotinum. And his almost as badass class. Who are tasked with killing him. Because if they don't by March, he will destroy the Earth. If they do, whoever is responsible will get 10-billion yen, which equates to about 126-million US Dollars. The thing is, Koro-sensei is the best teacher these students have ever had...
** Later on, Tadaomi, their overseer sent by the world government, also joins in as their phys-ed teacher in order to sharpen their combat skills. They also get the help of Irina Jelavic, a professional hit woman and FemmeFatale to act as their foreign language instructor.
* Negi Springfield from ''MahouSenseiNegima'' becomes dramatically more dangerous if his students are in danger. The same goes for Takahata. If there's a queen then Negi could be considered the king; after being impaled with a stone spear he collapses in a pool of his own blood. Then person that injured him turned his attention to Negi's student... and ''that's'' when he gets mad: he tears the spear out of his body and ''uses it to bash the guy in the head''.
** Also keep in mind that he's only 10 years old.
* Meisuke Nueno, better known as ''HellTeacherNube''. Harm his students, and it doesn't matter if you're a powerful ghost or demon. He ''will'' kill you.
** Ritsuko also qualifies: despite being absolutely devoid of spiritual power, [[spoiler:her CrowningMomentOfAwesome had her, usually portrayed as being scared to the death of even casual mention of the occult, doing what she could to protect a student endangered by an evil ghost until Nube came to rescue them both]].
** And of course, there's SexyMentor Minako-sensei, who actually ''died'' to save little Nube's life.
* Kumiko Yamaguchi from ''{{Gokusen}}'' is the homeroom teacher for a delinquent-filled school. However, she's also the 4th Generation female heir of a notorious {{yakuza}} gang. Indeed, she does a lot to protect (and also correct) her students...
* Seki-sensei from ''Anime/OjamajoDoremi'' isn't just a BadassTeacher, she's a [[BadassBiker Badass]] ''[[BadassBiker Biker]]''.
* Colbert-sensei from ''LightNovel/ZeroNoTsukaima'' is a TechnicalPacifist and vehemently opposes war, but when the students are in danger he kicks major amounts of ass.
* From ''Manga/FullmetalAlchemist'', Izumi "I'm a Housewife" Curtis. Endanger her students/child figures and you're in big trouble. ''Big'' trouble.
** ''Be'' one of her students and you're in even ''[[SinkOrSwimMentor bigger]]'' trouble.
* Aoki Daisuke from ''Kodomo no Jikan'' can be pretty badass when it comes to protecting Rin.
* Early on in ''TheLawOfUeki'', Kobayashi (pictured) demonstrates that [[ActualPacifist he may be against violence]], but if you threaten or harass his students, you will wake up in a lot of pain. Also, despite his love of justice, he is very mischievous...
* In ''WeissKreuz Gluhen'', history teacher Fujimiya Aya is the only person at Koua Academy to stand up to the AbsurdlyPowerfulStudentCouncil when they declare their control over the school, rushing to the defense of one of his students when S Class calls out a manhunt on the boy. Of course, this is mostly because both Aya and the student are undercover assassins investigating the school, although Aya ''probably'' would also have taken action to defend other innocent students if it had ever come up.
** One of Aya's fellow teachers, [[GenkiGirl Asami]], is ''very'' impressed by how Aya stands up to S Class, and does her best to emulate him when she stumbles across a severely injured and obviously terrified student on the school grounds. [[SubvertedTrope It doesn't go well for her.]]
* {{Soul Eater}} has the Shibusen faculty, with Stein as a particular example.
* ''Anime/YuGiOhGX''
** Chronos-sensei. Not only does he stand up to Camula to protect the other students who are carrying Spirit Keys (and most especially the pride of the school at the time, Kaiser Marufuji Ryou), but in season three, he puts himself in between his students and a rampaging horde of duel zombies, to delay said zombies and prevent them from stopping the students from getting to where they could get the help they needed to leave the desert dimension. And both times, he knew he was going to fail. He did it anyway. He has his bad points, but when his students are threatened, he will put his foot down (and then get knocked on his ass, but he doesn't let that get him down!).
** You might also include Samejima, the school's headmaster. He was the one who originally [[TheMentor trained Ryo]], and was presumably no slouch. "Presumably" because he never actually won a duel on-camera. But then, [[InformedAbility there had to be a reason]] why he was running this place and a monastery devoted to the Cyber-Style of dueling before that...
* The ''VideoGame/TalesOfSymphonia'' {{OVA}} has a scene where Raine takes out Lloyd with a ''piece of chalk'' when he was [[strike:not paying attention]] sleeping in class. And it ''knocked him down along with his seat''. That or she caught him off guard. Kratos would be disappointed.
* Basically every sensei on ''Manga/{{Naruto}}''. Especially Kakashi.
** Maito Gai is perhaps the most Badass teacher in the series. He isn't only TheAce and RatedMForManly, but he has never lost a fight on panel and has one-shotted one of the strongest characters in the series.
** Special mention to Asuma as well, who took on a group of Sound nin about to kill his student... and beat every single one of them in under thirty seconds. While still smoking.
** And poor Iruka, a Chuunin Academy teacher who in episode one completely fools an AxCrazy colleague and protects Naruto... after having a giant shuriken (among other things) embedded in his back.
** Jiraiya. As one of the strongest characters in the series, he's Badass from the word go; but its his students who really define him. [[TeleportSpam Namikaze]], [[TheGift Minato]], [[LaResistance Yahiko]], [[TheDragon Nagato]] / [[FallenHero Pain]], [[LadyOfWar Konan]] and [[AllLovingHero Uzumaki Naruto]].
* Stewart, the agent posing as a teacher in ''Anime/SonicX'', [[BecomingTheMask fell fully into the role]] and did everything in his power to protect the kids, most notably throwing off his orders to protect them during Chaos' rampage. Not to mention the episode where he gets captured along with some of the kids, and has to break out and protect them.
* Kagami of ''Manga/DenpaKyoshi'' is perfectly willing to risk his own life and freedom to protect his students' lives and freedom. Despite not being that willing to be a teacher in the first place.
[[/folder]]

[[folder: Comic Books]]
* Franchise/SpiderMan, for the brief time he worked as a science teacher at his old high school.
* The ComicBook/{{Huntress}}, of the [[Franchise/{{Batman}} Batfamily]].
* ComicBook/BlackLightning is also a teacher in his day job, and spends a lot of time trying to defend his students from the dangers of the streets. Often in costume.
** Chaim Levon from the ''ComicBook/GlobalGuardians'' was a Jewish school teacher before becoming the super hero Seraph and aiding Superman to dismantle bombs in Israel.
* The ComicBook/XMen are almost always {{Badass}}, and this extends to their teaching careers at the Xavier Institute as well. Emma Frost in particular is very protective of her students, probably because two of her previous classes of students were murdered.
* The teachers at ComicBook/PS238 are almost all retired superheroes. This follows logically.
[[/folder]]

[[folder: Comic Strips]]
* In ''Frazz'', Mrs. Olsen saves one of her students, Gabriella, by knocking her out of the way of an SUV driven by a texting driver. Both Mrs. Olsen and Gabriella suffer a broken arm.
[[/folder]]

[[folder: Fan Fic]]
* In FanFic/OhGodNotAgain!, [[spoiler: Sirius]] gets to become a Hogwarts professor. Yeah, you heard that right.
* ''Fanfic/FutariWaPrettyCureBlueMoon'' has Ami-sensei, who, despite her [[DitzyGenius ditzy]] nature and constant striving for a promotion she'll never attain, is a GadgeteerGenius who built a machine to communicate across dimensions. Oh, and [[spoiler:she's a retired MagicalGirlWarrior who's aware of the danger that her students put themselves in on a regular basis. When things get serious, especially when the DistressedDamsel to whom she is an [[HonoraryUncle Honourary Aunt]] is involved, out come the plans, the super strength, and the friendship beams of death.]]
* HarryPotterAndTheMethodsOfRationality features Professor Quirrell, who is as unlike his canon incarnation as possible. He stuns ''two hundred'' students with one spell to save Harry (ItMakesSenseInContext), can cast a Shield Charm strong enough to block fifty shield-breaking curses, glues bullies to the ceiling, and [[spoiler: has the Pioneer Probe plaque as one of his Horcruxes.]]
* In ''FanFic/{{Horseshoes and Hand Grenades}}'', we have Chuta Ohsugi who is about the exact opposite than his canon portrayal. Instead of a ButtMonkey, we've got a determined man who is willing to go against the woman he crushed on (Sonada) with nothing more than a slipper and a costume glove, fight his chairman head on and even proclaim that ''he'' will be the next principal of Amanogawa High. Haruka Utsugi also counts as she's willing to fight off against [[TheDragon Leo Zodiarts]] with nothing more than a katana. In ''Month of Sundays'', Takashi Satake is also stepping up to be this.
* Furutani Katsuo, resident zanjutsu teacher and Yuzu's class advisor in ''[[https://www.fanfiction.net/s/6902577/1/Phases-of-the-Moon Phases of the Moon]]'' is this coupled with CoolTeacher. While he doesn't actually ''fight'' any of the people who bullies his class, he does make it very clear that he's firmly on his students' side, encourages his students (including ''Yuzu'') to beat up their opponents from other classes when challenged, and likes to remind people that he was once a seated officer in Eleventh Division. [[spoiler: And when Karin's class gets ambushed by Hollows in the living world while on a training exercise, he doesn't hesitate to fight in their defense, albeit in the background.]]
[[/folder]]

[[folder:Film]]
* ''DangerousMinds'', with Michelle Pfeiffer.
* ''Film/KindergartenCop''. Bonus for being played by Creator/ArnoldSchwarzenegger, PapaWolf extraordinaire in his movies.
-->"You hit the kid, ''I'' hit ''you''!"
* Principal Duvall in ''Film/MeanGirls''. Doesn't do anything typically badass during the film, but sometimes sheer presence is enough: looking at the man, especially when he's giving a stern lecture whilst wielding a baseball bat, just tell me you wouldn't a) hang on to his every word or b) not want to take him on in a fight.
* In ''Film/TheSubstitute'' movies, professional mercenaries infiltrate high schools as substitute teachers to weed out the crime rings keeping the rest of the school in fear.
* David Niven's character in ''Film/TheGunsOfNavarone'' was a chemistry teacher turned explosives expert. He's never shown around students, though...
* In ''Film/SavingPrivateRyan'' Captain Miller's occupation back home is a mystery to his men. It turns out he was a high school English teacher.
* IndianaJones is never actually seen protecting his ''own'' students, but given he is a teacher with an extremely protective attitude towards kids, he probably counts.
* Principal "Crazy Joe" Clark, from LeanOnMe comes across as a SternTeacher, but in reality is a BadassTeacher for his entire school, chaining the doors during the school day to keep the students in and the bad influences out. Remembered largely for carrying a bullhorn and a baseball bat.
* Subverted in the film ''BadTeacher'', where CameronDiaz plays it as being just as much a jerk to her students as she is to non-students.
* He's [[JerkAss a dick]], but Snape also definitely counts. Take a look at the [[TheFilmOfTheBook ''Prisoner of Azkaban'' film]]. What does Snape do when he sees Lupin transformed? ''Instinctively puts himself between an out-of-control werewolf and his three least favorite students.''
** This becomes even more apparent when you take into account that [[spoiler:this was the same werewolf that had nearly killed him as a teenager.]]
* At the end of ''Film/XMen1'', Magneto asks Xavier what happens when someone finds out about his mutant school, and Xavier replies that he has a great deal of pity for anyone who comes to the school looking for trouble. In ''Film/X2XMenUnited'', he's proven right, when the teachers and caretakers fight side by side with some of the more powerful mutant students.
** More accurately: Wolverine kills a lot of black ops soldiers very efficiently and violently. Colossus hits a couple, and Siryn holds them up by screaming but that's it.
** Though he was probably referring to ''[[BewareTheNiceOnes himself]]'', since Stryker's forces only attacked when they knew that Xavier wasn't there, having incapacitated him ''[[DangerouslyGenreSavvy first]]''. Xavier also claims that if he wanted to, he could make Wolverine spend the rest of his life believing he was a "[[BrainwashedAndCrazy six-year-old girl with pigtails]]", simply for ignoring his rules about ''[[FelonyMisdemeanor smoking]]'' in the mansion! He was joking that time, but imagine the carnage Xavier could cause if he ever got downright ''[[GoodIsNotNice furious]]''?! [[note]]Look up Onslaught[[/note]].
* In Film/ByTheSword, Max Suba, once he has Erin as a fencing student, is protective of her, and once she gets hurt, fights the already established badass teacher Villard over his teaching techniques and showing him just what happens if you are a ruthless sword fighter.
* In ''{{Film/Warrior}}'', Brendan is a physics teacher who is also a MMA fighter.
[[/folder]]

[[folder:Literature]]
* TamoraPierce is fond of this character type. If you're a character in one of her books who fails to take teaching seriously, you're probably a baddie.
* Quiet, unassuming Mr Tidwell from ''Literature/{{Animorphs}}'' is actually a revolutionary fighter who has a symbiotic relationship with the Yeerk inside his head.
* Susan Sto Helit from Literature/{{Discworld}} becomes one of these in ''Discworld/ThiefOfTime''.
** From "Interesting Times", Teach. (At the end, he even goes berserk. After he's been mellow all his life).
* Most of the teachers in ''Literature/HarryPotter'';
** Mad-Eye Moody would be the straightest example. Both, [[spoiler: the real Moody, even though he never gets a chance to actually be a badass while a teacher, and the fake Moody, who manages to do a great job of impersonating a badass]].
** Dumbledore gets special mention, as the one and only time he rebuked Professor Umbridge was when she started physically attacking one of his students. And the one and only time he ever got angry with Harry Potter was when Harry thoughtlessly suggested that Dumbledore was leaving the school unprotected. There is also his UnstoppableRage when a bunch of Dementors showed up at a Quidditch match.
** As does [=McGonagall=]. Mess with her, and you get a disapproving glare. Mess with one of her students or colleagues, and she takes ''four'' [[FrickinLaserBeams Stunners]] to the chest ''[[NeverMessWithGranny at age seventy]]'' and bounces back with only a walking stick to show she was hospitalized for a month. Then, for an encore, she and Slughorn help an Auror take on [[BigBad Voldemort himself]] and live to tell about it.
** Severus Snape. He was a spy for Dumbledore, could fly without a broom, and during his spying days he lied to Voldemort's FACE for years. And he was an innovator, too. [[spoiler:He is in fact the Half-Blood Prince who was behind a number of innovative and sometimes ''nasty'' spells]]. And when he actually ''does'' teach, once you get past his JerkAss-ness, he is ''focused''; he teaches with a purpose.
** Lupin also deserves a mention, being the only member of the Order of the Phoenix other than Dumbledore to survive the battle in the Department of Mysteries unscathed.
* [[Literature/TheDresdenFiles Harry Dresden]], once he takes on Molly as his apprentice.
* The short story ''This Year's Class Picture'' by Dan Simmons has one of these who actually teaches a class of zombies after the ZombieApocalypse, and sits in a bell tower daily to mow down zombies invading her school. When the outside zombies mob together to attack her '''zombie''' schoolchildren, she burns them alive in a freakin' gasoline moat.
* Sister Montoya from ''WorldWarZ''. A badass ''nun'' teacher, who went on to join the army when they re-organized to start fighting zombies effectively.
-->Five three and a buck even, she'd protected her whole Sunday school class for nine days with nothing but a six-foot iron candlestick.
* Sherlock Holmes' ArchNemesis Professor Moriarty who is this, while being a ChessMaster.
* In the ''Series/StarTrekDeepSpaceNine'' novel "Fallen Heroes", schoolteacher Keiko O'Brian [[HeroicSacrifice holds off]] the marauding Bekkir long enough for Jake and Nog to escape. [[spoiler: It gets {{Reset Button}}ed, but it was still pretty awesome.]]
** This also qualifies as a MamaBear moment, because Keiko's primary motivation was to protect her daughter Molly who was also with Jake and Nog.
* Miss Chadwick, the quiet math teacher from the Creator/AgathaChristie novel "Cat Among the Pigeons", tackles a gunman in order to protect her fellow teachers and one of the parents. [[spoiler: She doesn't survive the experience.]]
* Numair from ''Literature/TheImmortals''. He's very patient and does a good job teaching Daine how to train her wild magic, given that nobody knows much of anyting about it, but gods help you if you interfere. He'll demonstrate that he is, in fact, the strongest mage in Tortall.
** The rather similar character of Niko Goldeneye in ''Literature/CircleOfMagic'' as well. He doesn't go in for much combat, but he still has a temper that should not be crossed.
* Miss Wilson in the ChaletSchool series. Leading a group of kids to safety through a secret passageway, with a gang of angry Nazis in hot pursuit? I'd say that's pretty {{Badass}}. Doubles as a MamaBear moment.
* Literature/TimeScout: Kit and Malcolm take it upon themselves to manage Margo's education in badassery. They hire Ann and Sven as tutor's for guns and close-quarters combat; two seperate sub-badassitudes, and not the sum.
* In [[LittleHouseOnThePrairie Farmer Boy]], Almanzo's teacher, Mr. Corse, is soft-spoken and rather on the smallish side. The oldest students in the school have a tradition of beating teachers nearly to death and breaking up the school--which tradition Mr. Corse proceeds to break by driving the boys out of the school with a [[WhipItGood blacksnake whip]]. The description of the damage he does and his complete lack of mercy is quite disturbing--particularly when he simply coils the whip after he's done and resumes teaching as if nothing had happened.
* Literature/CiaphasCain ('''[[TabletopGame/{{Warhammer 40000}} Hero of the Imperium!]]''') eventually gets to retire from [[AccidentalHero inadvertently]] being a {{Badass}} [[BadassNormal Commissar]]... in order to teach [[GenerationXerox another]] generation of [[BadassBureaucrat Commissars]]. The Imperium is [[InvokedTrope naturally expecting]] this trope to come into play, even before he starts working with three ''more'' Badass Teachers in order to protect the planet from an arm of the [[OhCrap 13th Black Crusade]].
* ''Literature/TunnelInTheSky'' has Deacon Matson. Short an eye and some fingers and a decorated survivor of the first interstellar expeditions. That includes an award for being the sole survivor of a disaster. He teaches college-level survival to high school students and believes that, instead of the sissy method of giving them any desired weapon, the students should go unarmed to a hostile ecosystem for the final test.
* Dimitri Belikov from ''Literature/VampireAcademy''. A badass dhampir guardian who teaches Rose how to use a stake. Eventually fights in a huge battle against Strigoi and takes several down in the process. Characters outright use the word "badass" to describe him!
* In David Klass' novel ''You Don't Know Me'' Mr. Steenwilly, the protagonist John's music teacher, is the only adult to notice [[spoiler:John's mother's boyfriend was physically abusing him and even took the initiative to follow him home one day. When the abusive boyfriend was beating John senseless, Mr. Steenwilly jumped in and saved John's life]].
[[/folder]]

[[folder:Live Action TV]]
* Takeshi Hongo of Series/KamenRider would like to do a [[FinishingMove Rider Kick]] to the monsters who harms not just his students, but to those who harm other people as well. And he's a BadassBiker too!
* Ian Chesterton and Barbara Wright from ''Series/DoctorWho''.
** Hell, the Doctor himself in the episode ''School Reunion''. And John Smith ends up being one [[spoiler: by sacrificing his life]] in "Human Nature"/"The Family of Blood".
* Giles from ''Series/BuffyTheVampireSlayer''.
** Technically he's just [[BadassBookworm the school librarian]], he doesn't actually teach any classes. Except private ones after hours about vampire slaying for a select audience, of course.
** Riley Finn was a badass TA.
* Harry Senate from ''Series/BostonPublic''.
* Tommy Oliver in ''Series/PowerRangersDinoThunder''. He doesn't ''want'' to be badass, he [[IJustWantToBeNormal just wants to be an ordinary science teacher]]. Nonetheless, he shows that he's more than willing to step back onto the battlefield after [[RetiredBadass years of retirement]] if his students are threatened.
* Santiago Mancilla in RebeldeWay. You don't mess with Third Year. Period.
* The protagonist of ''TheGreatestAmericanHero''
* The Hoshikawa [[SiblingTeam siblings]] of ''Series/ChikyuuSentaiFiveman'' are all {{Badass Teacher}}s.
* ''Franchise/UltraSeries''
** The human form of ''Series/UltramanEighty'', Takeshi Yamato, took elementary school teaching as his job. Considering what he can do in Ultraman form, it's not a good idea to threaten his students.
** Also, the original Series/{{Ultraman}} qualifies, somewhat. Not his human host, but ''Ultraman himself'', who was actually a university professor on his home planet.
* Mr Rimmer, headmaster of WaterlooRoad.
* World History Professor Milton Fine, alias [[RoboticPsychopath Brainiac]] on ''{{Smallville}}'' combines this with EvilTeacher and BadassBookworm for truly dangerous results.
* In ''Series/TeenWolf'', Ms. Morrell looks to be shaping up as one, if the end of season two is anything to go by, she's got ties to Deaton's past.
* In ''Series/TheVampireDiaries'' Alaric Saltzman, history teacher by day, vampire hunter by night. On a few happy occasions, these two interests have synergized when he finds old documents about vampires.
* Though she never actually takes anyone down physically, Laura Roslin of ''Series/{{Battlestar Galactica|Reimagined}}'' probably counts, considering she is a political badass who used to be a school teacher and will airlock anyone she sees as a threat to her people.
* Al's grade school librarian in ''MarriedWithChildren''
* ''Series/KamenRiderFourze'', being a ''Kamen Rider'' series set in an American-style high school, naturally has several. ''Movie Wars Ultimatum'', which takes place five years after the end of the series, shows that Gentaro himself came back to teach at his old school and still becomes Fourze to fight the random monsters that crop up once in a blue moon.
[[/folder]]

[[folder:Video Games]]
* All three teachers in the ''VideoGame/RivalSchools'' series -- Hayato Nekketsu of Taiyo High, and Hideo Shimazu and Kyoko Minazuki of Justice High -- exhibit this trope to varying degrees.
* Raine of ''VideoGame/TalesOfSymphonia'' continues to teach her three students Lloyd, Colette, and Genis while they are traveling across the world on their quest. Then she fights monsters and bandits and half-elves and brings down holy light on enemies with devastating power. Her role as the group's primary healer further cements her as a ''BadassTeacher'', since she has spells that are used for the express purpose of protecting her students from harm.
* Attack the Blood Raven initiates, especially the ones trained by [[DawnOfWar Cyrus]], I dare you. Even if you're a SuperSoldier enhanced with demonic power.
* The instructors of [[VideoGame/FinalFantasyVIII Garden]] qualify for this. Case in point: [[CoolTeacher Quistis]] [[HotTeacher Trepe]]. How did she once assist her students on the field? By taking down the [[SpiderTank giant spider robot]] that's pursuing them with a '''[[GatlingGood gatling gun]]'''.
* Keine Kamishirasawa of the ''VideoGame/{{Touhou}}'' series. Half-Beast history teacher and protector of the human village. Best portrayed in [[http://www.youtube.com/watch?v=A6oQkbJoRA0 this fanvid]].
* Franchise/ProfessorLayton, although we don't see a great deal of him interacting with his actual students in the archaeology classes he teaches, is certainly this for his apprentice Luke.
* [[spoiler:Jack]] in ''VideoGame/MassEffect3''. Also a CoolTeacher, judging by her students' comments towards her.
* ''MagicalDiary'' gives us [[HippieTeacher Professor Potsdam]]. Sweet little old lady who calls her students such things as "starshines" and "cygnet" in utter sincerity, doesn't seem to quite get the idea of discipline...and is over six hundred years old, with all the power to match. When it comes to it, [[spoiler:Damien]] runs rather than face her on her own ground. [[spoiler:Not that she can keep him from coming back for the May Ball, if you decide to take him back.]]
* ''VideoGame/TheWonderful101'' features Mr. Wedgewood, aka Wonder Red and the leader of the eponymous heroes. The beginning of the game shows him getting separated from his students, and the rest of the game involves him rescuing them and saving the rest of the planet as well.
* The Didact from {{Halo}} once taught at the "College of Strategic Defense of the Mantle", or simply the War College; it was in fact where he gained the name "Didact". He's also the leader of the Prometheans, the highest order of Forerunner Warrior-Servants, and one of the most capable warriors in the galaxy's known history.
* Professor Sycamore in ''VideoGame/PokemonXAndY'' is unlike any Pokémon Professor in previous games in that you can actually challenge him to Pokémon battles from time to time.
[[/folder]]

[[folder: Visual Novels]]
* Souichirou Kuzuki in FateStayNight in the Unlimited Blade Works route. TheDrifter who randomly came to town prior to the story and stayed at the local shrine. Despite being a perfectly normal human, he becomes the suspect of who Servant Caster's Master is. Simple mission: shoot him with a sleeping spell. If he is the Master then job well done, and if not then no harm done. Of course this doesn't turn out well when Caster warps in and saves him. But the battle is on our heroes' side! They've got Saber, the woman who is the strongest Servant! She gets past Caster and goes for Souichirou! And [[spoiler:THWACK. Souichirou counters and proceeds to unleash a SpamAttack on FistOfTheNorthStar levels.]] Yes, Souichirou just beat up [[spoiler: King Arthur]] with his bare hands.
** And then if you think back a day or two ago, this means he was also the one who snapped [[spoiler: Rider's]] neck in twain.
*** Even after [[spoiler:Archer betrays Caster and kills her]], he's back to being a normal human, he challenges [[spoiler:Archer]] to a one-on-one battle despite knowing he's going to be killed in one hit.
** Although not on Kuzuki´s level, [[SenseiChan Taiga]] is a 5th Dan in Kendo (who could´ve gotten alot further if her little strap on her shinai didn´t ban her from most tournaments) and a swordsman on level with [[KaraNoKyoukai Shiki Ryougi]].
* In the opening of ''VisualNovel/{{Tsukihime}}'', Shiki gets visited by Aoko Aozaki, and by the end of their little sessions, calls her Sensei from then on. Cue ''VideoGame/MeltyBlood'', where Aoko is a KungFuWizard specializing in FrickinLaserBeams.
* [[spoiler: Yumi Matsumiya]] from VisualNovel/TrueLoveJunaiMonogatari doesn't look like this, but fully shows why she deserves this title when [[spoiler: she and the MC find out that her fellow teacher Mikazaki is sexually harrassing Mayumi]] and when [[spoiler: a drunkard beats the shit outta the MC when he tries to protect her from him.]]
[[/folder]]

[[folder: Web Original]]
* Similarly, most of the teachers at [[SuperheroSchool Whateley Academy]] in the WhateleyUniverse, since many of them are retired superheroes. Even more frightening, some of them are retired super''villains''.
* [[EvilTeacher Coach Callahan]] from TalesOfMU. Aside from teaching such mundane classes as "Mixed Melee" and "Fighting to Disable", she is also one of the worst war criminals alive today. In her past, she has committed multiple genocides, stopped giants from taking over the world more than once, and has been charged with multiple counts of attempted deicide (most nations do not have laws against successful [[KillTheGod deicide]]).
[[/folder]]

[[folder:Webcomics]]
* Sandaur'recherrai Val'Illhar'dro of ''{{Drowtales}}'' is the combat instructor of Orthorbbae and it is a simple task for him to beat just about any opponents with ease and more then willing to use a GroinAttack to do it. When his clan left Chel, he went with them to their home city of Nuqrah'shareh and taught the students who were there as well. [[http://www.drowtales.com/mainarchive.php?sid=7950 When he comes across a group of rebels attacking his students]], [[CurbStompBattle he charged in and killed all of them, unarmed, unarmoured and without taking a single hit.]]
* [[http://destinyfailsus.com/comics/17/#.T74DRcWFnCE Mr. Sly]] in DestinyFailsUs.
* James Eglamore in ''Webcomic/GunnerkriggCourt''. As was [[http://www.gunnerkrigg.com/archive_page.php?comicID=559 his predecessor]].
** Not to mention Jones, who mentors mediums and ''beat Eglamore in a sword fight while unarmed.'' By blocking the sword with her ''face''.
** Kat's parents are scientists at the Court and she follows their footsteps. Her mother built a magitek computer to trap a body-stealing demon and in youth was building robots.
* Mr. Raven in ''Webcomic/ElGoonishShive''. He happens to be the son of an immortal, making him very old and very dangerous. Good with a SwordCane, and can summon a flock of exploding crows. Another case of [[BerserkButton don't mess with the students.]]
* Largo from ''Webcomic/{{Megatokyo}}'' is a subversion,because while he tries to do this, he just as often leads his students into danger.
** Although the fact that he's teaching an English class in Japan and doesn't speak Japanese is interesting. But they're still learning somehow.
-->"Doesn't Great Teacher Largo make you want to learn English so you can understand what he's saying?"
* Any of the teachers in ''MSFHigh''.
* [[DominicDeegan Miranda Deegan]]. A very evil mage once killed several of her students to get to her. She banished him to a realm of MindRape.
* In ''Webcomic/GirlGenius'', the caretaker for the students on Castle Wulfenbach is Von Pinn. [[http://www.girlgeniusonline.com/comic.php?date=20040903 Don't mess with Von Pinn.]] It is not pretty.
* Sidney Burns of ''MobTies''.
[[/folder]]

[[folder: Western Animation]]
* Laid-back HippieTeacher Mr. Van Dreissen attacks a guest speaker (somewhat wimpily) when WesternAnimation/BeavisAndButthead claim the speaker "touched" them.
** In a later episode [[DrillSergeantNasty Teacher/Coach Buzzcut]] walks in on the same speaker threatening the duo. Said speaker then unwisely attempts an attack on Buzzcut, an ex-Marine, who proceeds to beat the stuffing out of him.
---> ''"I do the ass-kicking around here!"''
** Van Dreissen's real CrowningMomentOfAwesome comes in ''Incognito'', where not only does he fail to show anything resembling fear when an unknown assailant shoots through the window of his classroom, after when Earl shoots back, driving the attacker off, Van Dreissen calmly confiscates Earl's pistol ''and Earl complies''. Sure it was supposed to be a satire about how desensitized to violence everybody has become, but it ends up making Van Dreissen look like a fearless BadassPacifist.
* Some of the teachers from ''WesternAnimation/{{Recess}}'' in ''WesternAnimation/RecessSchoolsOut''.
** Of the four named faculty, two were accomplished martial artists, one was able to use his Janitorial Supplies as Improvised Weapons, and the other one was a HippieTeacher as well as TheCutie, and showed a perfect example of BewareTheNiceOnes. The principal handled capture pretty nicely as well. Course, one scene had all the teachers rappelling into the cafeteria to help the kids in the fight against the BigBad.
** Especially effective in that of the four named faculty, two are the main antagonists of the series, one an ApatheticTeacher who wants nothing more than to move up the career path and stop dealing with children, and the other is the very essence of a kids show SadistTeacher. But if you mess with their kids, you're going down hard.
** One episode had a substitute teacher fall into this trope. The gang goes to school, expecting a free day, only to be greeted by a teacher, whom Spinelli describes, after seeing some of his actions, having "zero fear."
* The core of the Order of the White Lotus from ''WesternAnimation/AvatarTheLastAirbender'' is made up of CoolOldGuy Badass Teachers: Iroh, Pakku, Bumi, Jeong Jeong, and Piandao.
** Also,[[spoiler: Gyatso, the ActualPacifist air monk. He took on a ''platoon'' of powerful firebenders, while they were juiced up on the comet that made each of them into a walking, talking, ''armored'' PersonOfMassDestruction. And killed. them. ''all.'' as they brought him down.]]
** Toph as well. She joins the group in order to teach earthbending to Aang, and she's pretty much ''made'' of badass.
*** She also opened up an academy after the war to spread her knowledge of metalbending, which she invented.
** ''WesternAnimation/TheLegendOfKorra'' gives us Aang and Katara's son Tenzin, the world's only master airbender. He shows himself to be quite badass, taking out chi-blockers and one of [[spoiler: Sato's mechas]] by himself, and has passed on his skills to his three BadassAdorable children.
* Xavier, Wolverine, and Storm in ''X-Men Evolution'', along with Hank [=McCoy=] who was pretty tough ''before'' mutating into a blue, furry form.
* The title character of ''{{Cybersix}}'', who's a literature teacher by day and a superhero by night. There's also her love interest, the BadassNormal biology teacher Lucas.
* Principle Seymour Skinner from ''WesternAnimation/TheSimpsons'', while more of a RetiredBadass in his civilian life, Skinner is a Vietnam veteran and was a relatively successful military officer back in the day. While he usually goes out of his way to avoid conflict, he has no qualms about kicking serious ass if the situation (rarely) calls for it.
** [[https://www.youtube.com/watch?v=9eXTyfJJOJE Case In Point]].
---> "Copyright Expired"
* The Gromble from ''AaahhRealMonsters''. He is a SadistTeacher, but he'll also rain fiery vengance upon anyone who dares threaten his students.
* [[CrazyAwesome Ms. Frizzle]] from ''WesternAnimation/TheMagicSchoolBus''. C'mon, who wouldn't want to go one of her field-trips? (Besides Arnold, of course).
* Brian Lewis, who for most of his screen time delves into MoralMyopia as an ApatheticTeacher on ''WesternAnimation/AmericanDad'', shattered a hot pot of coffee in Steve Smith's face when he learned Steve had just punched a very young exchange student everybody liked with absolutely no provocation.
* ''WesternAnimation/StarWarsTheCloneWars'' Anakin is this to Ahsoka. Pretty much every other Jedi with a Padawan counts as well.
* Master Hamma from ''WesternAnimation/JohnnyBravo''.
* [[ExtremeGhostbusters Professor Egon Spengler]]. Invented a portable nuclear accelerator; [[DidYouJustPunchOutCthulhu punched out Cthulhu]] [[UpToEleven and other, similar deities]]; led a one-man charge against an ancient demon called Achira...and mentored a new generation of Ghostbusters.
[[/folder]]

[[folder: Real Life]]
* Drill sergeants in general.
* In the Finnish Army, schoolteachers are preferred as reserve officers.
* Because of the threat of suicide bombings against a certain girls school in Afghanistan, the complex was walled with only one gate placed far away from the main school building. At this gate a single teacher would sit, watching the gate. If a suicide bomber entered the teacher would attack him and try to detonate the explosive, [[HeroicSacrifice killing them both]]. And if that's not {{badass}} enough, the teachers were [[BadassGrandma 50 year-old women]].
* [[http://en.wikipedia.org/wiki/Liviu_Librescu Dr. Liviu Librescu]] of Virginia Tech, personally [[YouShallNotPass kept the door shut]] to prevent gunman Seung-Hui Cho from entering the classroom so his students could escape. It took [[HeroicSacrifice five shots to take him down]]. Of course, he had a history, since surviving the Holocaust takes a {{Determinator}} in itself...
** The same can be said for the four other (murdered) professors who attempted to confront or stop Cho from hurting their students. Although, despite the fact all of them should be considered heroes who made the ultimate sacrifice, in all honesty Librescu still is the most BadassTeacher - he held the armed and physically healthy Cho off long enough for all but one of his students to escape, ''being 77 years old''.
* There is the Troops to Teachers program; former military members get certified to teach, then go to (generally dangerous) schools.
* [[AnOfficerAndAGentleman Joshua Lawrence Chamberlain.]] A university professor, he took a sabbatical to fight for the Union in the American Civil War, saved the whole Union army with a bayonet charge, was wounded a half-a-dozen times, won the Congressional Medal of Honor, became a Brigadier General (after he was given a few hours to live; he got better) and returned after the war to become head of the school and teach every subject [[EverybodyHatesMathematics except Mathematics]]. He was also the officer chosen to accept Lee's surrender at Appomattox Court House and where he served four terms as Governor of Maine.
* Dr. David Benke, a math teacher at Deer Creek Middle School in Denver, tackled a gunman when he tried to attack the school. In a letter to the public explaining what happened, he wrote, "If we could have told the students what we felt before the incident happened we would have said, [[BadassCreed 'Not on my watch. On my watch you are going to be as safe as I can make you.']]"
* At a university-type MilitaryAcademy, many of the professors are usually commissioned officers.
* In Hanover, Germany, a 37-year-old kindergarten teacher named Ina Koenig saw one of her students fall down a mine shaft on a field trip. Immediately, she jumped in after him and kept his head above the extremely cold water at the bottom for two hours until help arrived, saving his life.
* The Sandy Hook shooting gave light to many badass teachers:
** Vicki Soto, a first-grade teacher, hid her kids in closets/cabinets and told the shooter that the kids were in an auditorium/gym. The shooter proceeded to shoot the teacher, but the kids survived. The mayor of Newtown wants to name one of the schools after her for her heroism. And she was all of twenty-seven.
** One of the teachers turned on the PA system to warn the rest of the school of the shooting.
** How did the principal die? She died lunging after the shooter, trying to stop him herself, probably knowing she was going to die.
* [[http://en.wikipedia.org/wiki/Jane_Haining Jane Haining]] doubles as this and BadassPreacher.
[[/folder]]

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