|"Spanish 101": Chang is first introduced in this episode.
"Social Psychology": Chang flips out during Professor Ian Duncan's psych experiment.
"Advanced Criminal Law": Chang discovers a crib sheet Britta made for an exam and later sits on a tribunal along with Ian Duncan and Dean Pelton to determine her academic fate.
"Introduction to Statistics": Chang attends Annie's "Dei des Muertos" Halloween party as a matador and helps Jeff seduce Professor Michelle Slater.
"Home Economics": In Spanish class, Chang lets Pierce throw paper balls in a sleeping Jeff's mouth.
"Environmental Science": Jeff takes Chang out in order to get his mind off his separation from his wife and also in the hopes that he will ease up on the course workload he had been heaping onto the class.
"The Politics of Human Sexuality": Chang makes fun of the condoms having holes at the STD Fair.
"Comparative Religion": Chang allows bully Mike Chilada to disrupt the Spanish exam and later announces to the Study Group that they've all passed and will see him in 2010 in Spanish 102.
"Romantic Expressionism": Chang attends the viewings of the two Kickpuncher movies in Abed's dorm room.
"Communication Studies": Chang embarrasses Troy and Pierce by revealing they sent Valentine's Day presents to themselves. He then forces them to wear ladies pant suits to the Valentine's dance.
"Physical Education": Chang watches Jeff's pool competition against Coach Herbert Bogner and asks the Dean if he is going to stop it. He also takes bets against Jeff.
"Basic Genealogy": Chang's brother Rabbi Chang visits him on Greendale's "Family Day" event.
"Beginner Pottery": When Pierce falls out the sailboat the S.S.Nose Candy onto Chang's parking space, Chang pulls up in his moped and yells for security.
"The Science of Illusion": As the Dean grills the Spanish 101 class over who killed a frog and threw a corpse out of a window, he reveals that Chang has a crippling fear of frogs.
"Contemporary American Poultry": When the Study Group takes over Greendale's chicken fingers, Abed makes a deal to give Chang fingers in return for a 10% bump on every Spanish test for the group.
"The Art of Discourse": When Pierce is kicked out the Study Group for embarrassing Shirley, Chang asks him if he wants to buy Girl Guide cookies. Before he can, Chang takes off with two Girl Guides in pursuit.
"Modern Warfare": Chang is brought into the campus Paintball assassination game as a ringer by Dean Pelton to prevent the students from winning the prize.
"English as a Second Language": Chang fraudulent credentials as a Spanish teacher are exposed, and he is fired from his position.
"Pascal's Triangle Revisited": Chang gets into a fight with Ian Duncan at the end of the year Tranny Dance.