Originally, it was a sketch that regularly appeared in the show Al Ritmo de la Risa, and it was titled La Escuelita. The sketch was so successful that when the program ended, its creator Jorge Ortiz de Pinedo decided to redesign it and complement it, even more, to turn it into a series with a space of its own inside the then-nighttime of the comedy program bar of Canal de las Estrellas. Not all of the sketch's original cast appeared in the unitary program (in fact, the original teacher was Maestra Mankita who was replaced by Maestra Canuta).
A playlist of most of the episodes of the series can be watched here.
Cero en Conducta provides examples of the following tropes:
- Author Avatar: Jorge del Mazo Geis, the protagonist, is played by Ortiz de Pinedo.
- Big Eater: Zoila Gordoa Delgadillo. She almost always carries an oversized sandwich with her, and complains about being hungry when she is in detention.
- Butt-Monkey: Everyone in the series, especially Jorge and the teachers. The former quips about their most defining traits, followed by them applying their punishments on him.
- Book Dumb: Poncho El Chico. He is the most dim-witted student in the class as well as the most emaciated; Zoila makes fun of him for the latter.
- Camp Gay: Agapito Melo Aguirre. He is only there to be mocked and made fun of by his classmates for his effeminate mannerisms, especially from Poncho el Chico.
- Catchphrase:
- "Sí es, sí es"(He is, he is) said by Poncho el Chico after the students make fun of Agapito after he says anything, followed by Maestra Canuta asking "¿Sí es qué?"(He is what?) Then Poncho answered with a homophobic description, doubling as a Running Gag.
- Another one from Poncho: "¡Yo soy Poncho el Chico, por que mi papá es Poncho el Grande!"(I am Poncho the Small One, because my dad is Poncho the Big One). He says this every time his name was mentioned, accompanying them with gestures that looked like he was Flipping the Bird.
- Every time another student or one of the teachers does something stupid, Jorge always says, "¡Burro!"(Ass!)
- "Es que como yo soy argentina no entiendo nada"(As I am an Argentinian, I don't understand) is said in a heavy Argentine accent by Virginia del Chimichurri every time she is asked anything.
- Comically Cross-Eyed: Director Patiño, which earned him the nickname of Profesor Birolo.
- Corporal Punishment: The teachers are fond of doing this, though this is Played for Laughs.
- Dawson Casting: Invoked in the students' case. This is an exaggerated and possibly creepy example of this trope, especially if you take into account that the female characters' uniforms are sexualized and male characters (especially Jorge) perv on them. And the characters they're playing are supposed to be third-graders.
- Fat Bitch: Maestra Canuta. She will hit anyone who engages on unruly behavior or at least dares to make fun of her, including Director Patiño.
- Fat Comic Relief:
- Zoila; as she always brings an oversized sandwich and the other students pick on her for being overweight. A gag even had her literally shaking the earth with just her walking.
- When Zoila's actress Sheyla left the show, Gordonio Arredondo de la Maza (played by Rubén Cerda) took her place in this trope. Some of Zoila's gags even applied to him, such as her earth-shaking walk.
- Flat Character: They don't have any other defining traits other than their comedic gimmicks.
- Height Angst: Homerito, as the other students make fun of him for being the shortest one of the class.
- Manchild: Jorge is implied to be this due to the other students and teachers take wind of his mustache.
- Masked Luchador: Though technically not one, Próculo always wears a luchador mask.
- Nerd Glasses: Casimira, as the jokes about nerds and people with vision problems revolve around her.
- Ocular Gushers: Despite not being visible for being in a live-action series, Homerito cries like this when hit and only stops if hit on the head.
- Prone to Tears: Carmela. It simply takes something "inoffensive" about her to make her cry.
- Punny Name: All of the students have names referring to their only defining traits.
- Queer People Are Funny: Agapito's entire shtick in the show. He is only there to be made fun of by the other students for his exaggeratedly effeminate behavior, especially from Poncho el Chico.
- Simpleton Voice: Poncho el Chico. This is fitting for his dim-witted demeanor.
- Special Guest: Some episodes can feature comedians or characters from other shows from Televisa.
- The Unintelligible: Próculo. He speaks in gibberish that sounds like offensive or vulgar sentences and Jorge has to translate for him. He can say understandable things, but this is very rare. This can be justified as he always wears a tight luchador mask.
- Of course, when he interacts directly with Jorge, the latter can't understand what he's saying.
- "The Villain Sucks" Song: The students occassionally engage in singing songs mocking Maestra Canuta and Director Patiño.
- Tomboy: Lola Meraz. Her uniform is less revealing than the other students', wears a cowboy hat and carries around two toy guns, with which she simulates shooting every time someone makes fun of her for her tomboyish behavior.
- Translation: "Yes": This is a common gag involving Próculo and his gibberish.
- Unsympathetic Comedy Protagonist: Jorge. He makes fun of the teachers and the other students, he always shows up late in class and makes excuses about it just to throw in a gag or make fun of the teachers again and he plays during class time.
- Verbal Tic: Gerardito speaks in diminutives, which sets off Maestra Canuta.
- Vulgar Humor: Some of the students' names (especially the females) reek of this trope. For example, Lola Meraz sounds like ''lo lamerás" ("you will lick it").
