Alberto León Jaramillo
Profesor Gutiérrez (voz)

Beatriz is at her new school; she hopes to have a chance to make friends, and Valentine's Day is the perfect opportunity to do so, but things don't turn out quite as well as they seem.
After a long day of classes, Betty decides it would be a good idea for Nico to study with her; she succeeds, but Nico becomes interested in Patricia, who has a wicked plan to submit a successful science project.
This time, the task is to work in groups to create a proposal for the school TV program; Betty and Nico eventually find other classmates to work with, and although things didn't go quite as expected, the "Ugly Club" learned a new lesson.
It’s the weekend, and Betty goes out with her friends; feeling lonely, Nico decides to get a pet for company. He finds Claudio the chicken and brings him home without permission. Months pass, and then Doña Nicolasa discovers the chicken—the ending is unexpected.
Daniel still wets the bed; Marcela finds out and threatens to reveal his secret at school—though that may not even be necessary, as they are heading off to camp where he could easily be caught. However, Daniel has a plan to prevent that from happening.
The latest trendy toy arrives; Nico wants it, but Doña Nicolasa doesn’t have the money to buy him the toy. However, the creators of "Pokemondongo" purchase a recipe from Nico’s mother, and he ends up getting his new toy.
Betty is the smartest girl in the class; her classmates Marcela and Patricia are envious, so they want to see her fail at something—which is why they convince Hermes to let her enter a beauty pageant, hoping she will lose.
Don Hermes and Julia decide it’s time to explain to Betty how babies come into the world, using a metaphor; meanwhile, at school, she gets stung by a bee, and the drama of becoming a mother begins.
After failing to make the cheerleading squad, the "ugly girls" club is reluctant to help Marce with a bet; however, Betty convinces them, and the girls end up winning a hard-fought soccer match.
It’s time for auditions to play Juliet, and Betty is ready to land the lead role—and get to kiss Armando on a magical night, without Marcela or Patricia standing in the way of love and art.
Betty writes her name next to Armando’s, but the girls from the "squad" notice the diary and want to know who her crush is; however, the diary ends up in Armando’s briefcase, and now it’s time to get it back.
Marcela does not choose Armando for her monitoring campaign, so he decides to help Betty as a way to take revenge for his girlfriend’s disloyalty; and although Betty wants to secure the monitoring role in a fair manner, Armando has a different plan.
Nicolás arrived in class with chickenpox, and Mario—after having touched him—points it out to everyone; now, no one wants to be near him, but Betty helps him, as she has gone through that same situation herself.
It’s a field trip day, and the television station proves to be the perfect place to find fame; the children from the Gimnasio Postmoderno school take part in an audition, and Betty is chosen for the soap opera—but Patricia won’t let that happen.
It’s an emotional day for Nicolás; the Father’s Day musical is approaching, and Nico is determined to find a father figure—at any cost—to introduce to his classmates. The best candidate is Don Hermes.
Following a failed experiment, Professor Gutiérrez is away from the school for a while, and the new substitute teacher has stolen Freddy’s heart—though his feelings are not reciprocated.
Nicolás loves Patricia and intends to win her over by playing soccer—even though he knows it’s not his strong suit—but his luck is set to change with the help of a genie, who provides Nicolás with exactly what he needs to win the heart of his beloved.
A fire causes the school to suffer major losses, and the only person who can save it's Mr. Gutiérrez with his lottery ticket; however, he dreams of traveling to space—yet his love for the school proves greater than the trip itself.
The figure-riding contest is Nicolás’s chance to get a new bicycle; after rigorous training, the day of the competition arrives, and Nicolás emerges as the winner.
The kids head off to school—Betty dressed in her best look—but her classmates mock her, so she asks Nicolás for help; thanks to his chemistry skills, the transformation is striking, though it isn't permanent.