Señor Chang reveals to Jeff that he does not have a teaching degree and asks him where he got his. The conversation is inadvertently recorded by Annie, who records all classes for taking notes. When Dean Pelton finds out, Chang is replaced by another, much stricter professor who has the class take a much harder Spanish final. Meanwhile, Troy discovers he has a natural talent for fixing plumbing, and must ward off a persistent maintenance worker (Jerry Minor), who wants him to use his talent to become a plumber. As everyone faces the fact that they will have to retake Spanish, Jeff realizes that Annie was the one who turned in Chang, remembering that she records every class, and Chang's confession. As everyone shuns her, she tries to redeem herself by making things better with Chang, who finds that his life is better for it, and she helps everyone study for, and pass the final.