There is always that one teacher, the one who is always bringing his or her politics into the classroom and is extremely passionate about it. Be it about religion, the government, or ethics, morality, and values, this teacher is always ready with their own arguments and/or long-winded speeches. Typically, this person teaches a class involving social sciences (e.g.: history, sociology, politics), but it can be any teacher in any subject. College professors are even more likely to be politically motivated.
The Politically Motivated Teacher can be portrayed either as a positive or a negative thing, generally depending on whether or not the teacher's views align with the author's. If it's shown in a positive way, then the teacher will often stimulate intelligent debate, helping his or her students to think more critically about the events in the world around them and get more involved in society. If it's shown negatively, the teacher will run the classroom with an iron fist and punish students who voice dissenting political views instead of promoting discussion. Either way, expect anvils to be dropped like a bowling ball tied to a weak tree branch.
A Hippie Teacher can be related, for reasons of hippies being very politically radical. The negative version of this trope often takes the form of a Sadist Teacher with Strawman Political elements, while a positive version is usually a Reasonable Authority Figure.
This trope is definitely Truth in Television, as any college student (and sometimes high school students) can attest to. The political alignment of these teachers often correspond with the general atmosphere of the school in which they teach, though there are without a doubt many who go against the grain of their institution's political philosophies.
- The ''Chick Tract "Big Daddy?" has a teacher kick a student out of his class for citing The Bible for his disbelief in evolution, only letting him back in to "tear [his] little beliefs to shreds in front of the entire class". The student counters and eventually breaks him.
- Dykes to Watch Out For plays with something seen under real life in this exchange from 2005 between Neoconservative student Cynthia and Ginger:
Cynthia: The evidence speaks for itself. On a faculty of 250, there are only 15 openly Republican professors.
Ginger: What are you proposing? Ideological diversity through affirmative action? That's real Conservative.
Cynthia: I'm proposing that impressionable students hear all sides of the issues. Does that threaten you?
Ginger: If all sides includes Creationism and Holocaust denial and the novels of Ayn Rand, then, yeah, I guess it does.
Cynthia (angrily scribbling): 4:22 p.m. Professor Ginger Jordan mocks one of my intellectual heroines. (to Ginger) I'll just post this little incident to the Academic Freedom Complaint Center.Ginger: Cynthia, if you really want more Republicans on the faculty, try getting our salaries quadrupled.
- Clueless has Miss Geist, who wants to inspire her students to save the environment and aid disaster victims. She's portrayed as dorky, but likable.
- The teacher obsessed with Vietnam in Back to School brings a certain kind of psychotic passion to his classes.
"Mr. Tergeson's really committed. In fact, I think he was."
- Dead Poets Society: Mr. Keating spends more time spouting Romantic and Transcendentalist ideals in his class than actually teaching. Then again, he is a literature teacher, so that comes with the territory. The trope is played with because Keating arouses the ire of parents and administrators for actually realizing what it was he was teaching and doing so effectively.
- The Women's Studies professor from Sorority Boys is a terrifying example of a Straw Feminist. Among the lecture topics in her class is the "Myth of the Male Orgasm," prompting a confused look from Dave, the only male in the class.
- A mild example appears in Superman IV: The Quest for Peace.
- The Prime of Miss Jean Brodie is a negatively-slanted Trope Codifier. She's overtly sympathetic to Mussolini and Francisco Franco, an ideology that turns her classroom into self-centered personality cult. Her teachings warp her charges to the point where one girl goes to fight in the Spanish Civil War and dies. She's pointedly called out on this at film's end.
- Professor Radisson from God's Not Dead is an atheist philosophy teacher whose first action in his new class is to make his students sign a statement saying "God is Dead" or else he'll fail them; The Christian protagonist, Josh, refuses to do so, so Radisson challenges him to debate God's existence with him in front of all the classroom at the end of every class session, and if he can't prove God's existence he'll fail him. It becomes clear that Radisson only intends to humiliate him for his beliefs and it later turns out that he is a Hollywood Atheist who has always hated God because his mother died of cancer when he was little.
- The teacher in Dazedand Confused tries to implant leftist ideas in her students by, for example, telling them about her "bitchin'" experience at the 1968 Democratic Convention.
- Justified in Robert A. Heinlein's Starship Troopers. The History and Moral Philosophy class every student is required to take attempts to implant pro-military beliefs and encourage joining the Federal Service, so the teachers — all retired veterans, by law — naturally push these political and philosophical values on their students.
- In StarshipTroopers, he puts his money where his mouth is, resuming his commission with the Mobile Infantry.
- HMP instructors are very focused on exposing their students to this philosophy and belief, but as is explicitly pointed out, you can't fail and there are no penalties for either sleeping through the course or passionately disagreeing with every word being stated.
- A similar example is Kantorek in All Quiet on the Western Front, who encourages his students to join the German army in World War I, greatly romanticizing it as something glorious. Of course, he couldn't be farther from the truth. One of Kantorek's former students gets payback when he becomes his commanding officer. He reminds Kantorek of a fellow student who died in agony after joining the frontlines thanks to Kantorek's speeches and makes Kantorek follow humiliating orders.
- Professor Dillamond in Wicked is extremely passionate about his beliefs about the prejudice against talking animals in the school system and his fears about what is happening to them, fears which turn out to be correct. This has a profound effect on Elphaba, particularly because of the prejudice against her for her green skin.
- The eponymous subject of Tuesdays with Morrie, Morrie Schwartz, was said to have been very much an activist, even giving his students all A grades to prevent them from being drafted.
- Harry Potter and the Order of the Phoenix: Dolores Umbridge is a negative version who teaches Ministry propaganda and punishes students (and eventually teachers) for disagreeing with the party line.
- An interesting inversion in Avi's Nothing But the Truth, in which everyone except the teacher (and the student that the book focuses on) has an agenda.
- Bill's old writing professor in It is a negative example. He cared more about pushing a liberal agenda than about teaching his students how to write good stories. He failed Bill out of his class solely because Bill challenged his attempts to make everything about politics. Bill's final "screw you" to his old professor was to send him a copy of a magazine that liked one of Bill's stories and published it.
- In Speak, Melinda's teacher Mr. Neck likes to rant about various political topics, such as how illegal aliens are stealing jobs from hardworking Americans.
- Square Pegs had a Vietnam veteran turned football coach who obsessively compared every event on the football field to Vietnam, and blamed the team's defeat on the treacherous liberal media.
- One episode of Bronx Zoo had a science teacher become a born-again Christian after surviving an accident where a cross-shaped beam narrowly missed falling on him. He become convinced the Bible was the literal word of God and started teaching creationism rather than evolution in his class.
- Not exactly a teacher, but in The George Lopez Show, Max's Treetop Rangers leader liked to rant about how recycling is bad and how cops should be allowed to profile Mexicans. When Max's dad George confronts him, saying that he is Mexican, he says "Oh, not like you. I mean one of those 'Me no speakee' Mexicans."
- Nicky Reagan tangles with a leftist teacher in one episode of Blue Bloods and is denied entrance to Rutgers after flaming her on Twitter. When Erin takes Nicky to apologize, the teacher has a portrait of Che Guevara on her wall. Things go downhill from there.
- Quite a few Urban Legends archived and discussed on Snopes have such teachers, typically involving them teaching a lesson to their students or getting into a fracas with a student of a different political alignment. A few examples (of varying degrees of truth) include a professor giving his students a hands-on lesson about socialism, a teacher having veterans come into her class to impart patriotism to her students, and a Hollywood Atheist professor attempting to disprove the existence of God...by dropping a piece of chalk.
- Not Always Learning has a disturbingly large amount of these teachers (though the students or the students' parents can be just as bad).
- Bobby's History teacher on King of the Hill is ridiculously pushy and political.
- South Park's Mr. (or Mrs.) Garrison has been known to do this on occasion, though less blatantly, as it's often left to offhand comments (such as in South Park: Bigger, Longer & Uncut when he declared the Mothers Against Canada were "probably just all on their periods"). In "Follow That Egg!," however, (s)he manipulates the lesson in a ploy to keep gay marriage illegal (though his/her motivation is more personal than political). (S)he does the same thing when it comes to teaching evolution (first being vehemently opposed to it as a creationist, then switching to being vehemently anti-religion). (S)he explains that her/his only consistent belief is that you have to be an asshole to anyone who disagrees with you.
- The Fire Nation schools in Avatar: The Last Airbender are staffed entirely with these sorts of teachers, whose lessons all carry a heavy undercurrent about how wonderful their country is and how their imperialism is for the good of the world. This has less to do with the teachers themselves and more the Fire Nation seeing that these values are imparted to the younger generation. Since the Fire Nation has been in this state for a hundred years, it's likely the school was like this before the current faculties were ever old enough to attend.
- Daria: Radical feminist Ms. Barch, though her motivations are more personal than political. She never bothers to espouse any feminist viewpoints, nor tries to teach any to her students. She simply uses class as an opportunity to repeatedly vent about her no-good ex-husband, and take out her frustration on the male students.
- Education for Death: The teacher of a class of boys in Nazi Germany actually wears a party uniform to work while he indoctrinates his pupils.