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- Chapter 5.5 of A Centaur's Life is about a teacher giving a primer on how evolution went on this Alternate Universe, giving birth to the various human sub-species and how this made racism even a worse problem than in our world.
- Happens in the first episode of Eureka Seven.
- Happens in the first episode of Gunslinger Stratos The Animation to explain (sort of) how Japan became fragmented due to the rise of the megacorporations.
- In Mnemosyne, some Back Story about the Tajimamori and the "Fruits of Immortality" are filled in during a lecture at Mishio's high school. Notably, the lecture is on the topic of legends and myths but turns out to consist of pretty accurate truth.
- Subverted in Neon Genesis Evangelion: it turns out the teacher's expository teaching is the government's cover-up version of the backstory.
- One entire episode of Read or Die: the TV series is devoted to a character writing the Exposition Lecture that another character has to give.
- In Yuki Yuna Is a Hero, some critical background information about the setting is delivered during Itsuki's history less in Episode 4.
Film — Animated
- Milo gives two lectures on Atlantis in Atlantis: The Lost Empire. The first one is actually his rehearsal for a proposal to his superiors, which he never gets to give due to them suddenly changing the time that makes it impossible for him to make the meeting.
- He later attempts to give a lecture to the Rag Tag Bunch Of Misfits with a slideshow and some plumbing metaphors, only for some of his vacation photos to get mixed in by mistake. "Hubba-hubba!"
- How to Train Your Dragon begins with one. In the space of a 5 minute lecture, Hiccup introduces himself, the other villagers, and the different species of dragon while at the same time sounding almost like a tour guide.
- In Zootopia, Judy's narration in the opening School Play fills the audience in on the history of Zootopia.
Film — Live-Action
- 21 has Kevin Spacey's professor character tell us about the Game Show Problem during a lecture. He is an MIT professor, after all.
- Done rather creatively in The Big Short. Rather than fill the viewers in on complex financial issues through traditional exposition, the film Breaks The Fourth Wall to introduce celebrities to explain them. We get Margot Robbie explaining mortgage bonds in a bubblebath, Anthony Bourdain using unsold fish to illustrate how banks handle unsold mortgages, and Richard Thaler and Selena Gomez at a blackjack table illustrating how synthetic CDOs work.
- Deepwater Horizon: Not quite, we just see the practice for one. Sydney's demonstration of Mike's job for a parent career day involves shaking a can of soda up, then punching a metal pipe into it, followed by pouring honey down the pipe to keep the soda from coming out, which will show her classmates (and shows the audience) what drilling mud is and how it works.
- The Final opens with a high school history teacher describing how the Han Dynasty would sometimes leave their defeated enemies alive, disfiguring them in order to serve as an example to those who would oppose them. Guess what a group of pissed-off teen outcasts do with this knowledge...
- This is how we learn the main complication in Give My Regards to Broad Street — in a board meeting.
- Subverted amusingly in Indiana Jones and the Last Crusade. Dr. Jones is showing giving a lecture on archaeology, but he merely makes the point that archaeology is not about journeying to exotic lands and following ancient maps to lost cities, "and X never, ever marks the spot." Since this is Indy, however, he definitely does not go on to practice what he teaches — and he even references the lecture later with a wry grin when it turns out that X does mark the spot after all.
- In Knowing, Nicholas Cage's character gives some basic information about the sun and the fate vs. free will philosophies during his college lectures.
- Older Than They Think: This trope shows up in The Last Will of Dr. Mabuse by Fritz Lang from 1933.
- The Rite has Father Lucas explaining the basics of exorcism in lectures at the beginning of the film.
- Serenity starts out with one of these (a teacher giving a history lecture to a group of young children).
- It isn't clear from the very beginning due to the matryoshka-doll-like Framing Devices at work, though.
- Shattered Glass is about former journalist Stephen Glass and his now-notorious career as a fabulist for The New Republic. It includes as a Framing Device several scenes in which Glass is telling a class of journalism students about his career for TNR. Besides presenting basic plot exposition, Glass' talk explains the fact-checking process at a magazine and illustrates how Glass got away with his fictions (in short: the main fact source was the reporter's notes, which Glass fabricated).
- In Species, Fitch gives a lengthily exposition of the SETI project and the failed DNA experiment to the summoned group in his boardroom.
- Stargate opens up with Daniel Jackson giving a lecture on why he believes the ancient Egyptians did not build the great pyramids. The people listening to him all walk out at the ridiculousness of the theory. In a radical plot twist that surprises no one, he was right.
- Transformers Film Series:
- A class presentation but one not from a teacher, Sam attempting to sell his stuff at Show and Tell in Transformers when told to give a lecture on his ancestors as part of his grade. However, he is distracted by Megan Fox doing that weird thing she does with her teeth.
- In Transformers: Revenge of the Fallen, Sam has a "full-blown meltdown" in the middle of the first day of astronomy class, and ends up babbling at breakneck speed about various things that become important later on in the film.
- In Dan Brown's book The Lost Symbol, Robert Langdon lectures his symbology class on the secrets of Freemasonry.
- The Harry Potter series occassionally uses these (in addition to Chekhov's Classrooms). For instance, Professor Binns' (McGonagall in the movie) retelling of the Chamber of Secrets legend and Moody's demonstration of the Unforgiveable Curses.
- In The Name of the Wind, this tends to be the way the reader learns more about the world. It's occasionally presented as a story or myth, instead.
- The Assassins of Tamurin teaches the reader the history of the Constructed World via a session of the heroine's history class.
- The Functional Magic of the Mistborn series, allomancy, gets explained to the readers through Kelsier's lessons to Vin.
- In Ashes Of Victory, Honor Harrington has been assigned shore duty as a Military Academy instructor while she recuperates from (extensive) injuries she suffered in the previous two books. We are treated to a number of such lectures, including one where a junior officer mortifies a group of awe-stricken midshipmen by calling Honor's tactics in a recent operation horribly reckless, stating that she only came out alive because the enemy simply wasn't paying attention that day.note
- A teacher in Strength & Justice: Side: Strength educates the reader on the history of the city in the form of quite a large Infodump taking up several pages.
- In Theodore Judson's Fitzpatrick's War, the general history of how the world turned into a post-apocalyptic steampunk Neo-British Empire-dominated dystopia is recited in a verbal exam by the novel's protagonist, Robert Mayfair Bruce. Coincidentally Bruce was shocked to have gotten such an easy topic.
- Pharaoh has quite a lot of fleshing out of the Ancient Egypt setting, some of it in lecture form.
- Breaking Bad gives us a scene where Walter White, a chemistry teacher, describes how energy can either be released gradually and unnoticeably or suddenly and violently... and in the episode's climax, uses mercury fulminate, the explosive he described in class to successfully threaten a violent drug lord.
- Buffy the Vampire Slayer did it in "Hush", where everyone's voices have been stolen. Giles delivers the exposition through transparencies and mime.
- Doctor Who: At the beginning of "Oxygen", the Doctor delivers a lecture on the dangers of the vacuum of space. Of particular note is his description of how long you'll take to pass out, and his mention that the fluids of the eyes will boil. Bill gets to experience some of those symptoms when she's exposed to the vacuum of space without a helmet, and the Doctor winds up blinding himself when he has to give Bill his helmet so she'll survive a spacewalk.
- The Enemy at the Door episode "The Raid" is about a British commando team raiding a German radar installation during World War II. It happens to coincide with an inspection tour by the German brass which begins with a lecture from the officer in charge of the installation to impart the necessary information about the installation's function to the visiting officers and to the audience.
- Game of Thrones:
- Maester Luwin teaches Bran of the various Houses vying for power in Westeros, which also serves to educate the audience on the matter.
- Sansa gets quizzed by her septa about the history of the Seven Kingdoms.
- Happens frequently in Hannibal. When he's not profiling for the FBI or getting psychoanalyzed by Dr. Hannibal Lecter, Will Graham is a lecturer on profiling and criminal psychology at the FBI academy. His lectures flesh out the show's backstory or the psychology behind the case of the week, and occasionally provide Mythology Gags or Foreshadowing (i.e. the time he lectures on the killer of the week to a hallucinatory class, foreshadowing his mental illness).
- Murdoch Mysteries: Late in "Big Murderer on Campus", Murdoch is in a university classroom giving a lecture on the "applied physics" of execution by hanging. The lecture turns into a means of pressuring one of the accomplices to a murder into confessing against the other—the soon-to-be-infamous James Gillies.
- On Relic Hunter, Sydney was telling her class about a particular Indian tribe's mysterious shift in culture right before she went out and solved the mystery.
- Stargate SG-1: Jack O'Neill's young clone lectures a class of pilots on the F-302.
- In the first scene of Abe Lincoln in Illinois, a teacher is giving young Abe a lesson in grammar — using the text of a Daniel Webster speech as material. The audience is thus given a little lesson on secession and state's rights as political issues.
- The opening of Final Fantasy VII combines this with a solid Establishing Character Moment. Barret asks Cloud, who has just joined Barret's group, if he's familiar with Mako reactors, and — despite the fact that Cloud tells him that he is — starts lecturing him about what Mako reactors are. Cloud's understandably annoyed reaction causes Barret to get pissed off with him, and they continue bickering for the first couple of hours of the game.
- Gabriel Knight: Sins of the Fathers has Gabriel attending a lecture at Tulane University early in the game where he learns some important concepts and terms relating to Voodoo.
- God Eater Burst has several cutscenes of Dr. Sakaki briefing the Player Character, Kota, and Alisa on the nature of the Aragami. Justified as the main characters are all new recruits, with you and Kota hinted at not having had much of an education at all, and Fenrir wants to spread around its institutional knowledge so nobody leaves too big a hole if they die suddenly.
- Tales of Symphonia introduces its Cliché Storm plot in this only moderately clichéd way.
- In Alice and the Nightmare, chapter two uses its university setting to give us two lectures and one practical lesson on the topic of magic systems and the history of Wonderland.
- Bob and George As a flashback.
- This Dumbing of Age - Leslie's Gender Studies lecture gives background on the current storyline. The Alt Text lampshades this.
- Thomil of Juathuur shows us how it's done.
- Amical teaches his seedlings magic in morphE using morning magic lectures. They serve for exposition, world building and catching readers who do not play World of Darkness up on lore.
- One Tales of the Questor side story was a classroom lecture about the setting's Minovsky Physics. (In the storyline, it functioned as the first step in Doing In the Wizard.)
- A favorite technique in the Whateley Universe, since it's set largely in a Superhero School. We've seen lectures on supersuit design, several kinds of superpowers, strategy and tactics, the (made-up) physics behind this universe, how magical contracts work, and several other things.
- An chapter of Brennus is about an "Introduction to Metahuman Studies", providing an Infodump on superpower classifications. This is justified by the creation of a new superpower classification system, and so the characters, as well as the reader, have to be informed.