Continuity: In the seventh grade hallway, the boys bathroom was also used as Mr. Feeny's office and as a guidance counselors office.
Continuity: During the high school seasons, there are quite a few errors. The hallway, classroom, and cafeteria are the same as when they were in middle school. The room next to the payphone is the boy’s bathroom as well as the principal's office, and Mr Turner's classroom is also Mr Feeny's.
Incorrectly regarded as goofs: As with any long running series, certain details change as the show progresses and writers change. Both Shawn and Topanga, for instance, have sisters in the first season but are later depicted as only children. In the show's earlier years, Topanga's mom was named Chloe, but in later episodes she's known as Rhiannon. Inconsistencies like these are generally forgiven in series.
Continuity: In the episode "Hair Today Goon Tomorrow" the guy who gives Topanga his card, his hair changes between the shots, in one shot there's a piece of hair in his face and the next it's gone, and then it's back again.
Continuity: At one point, Cory states that Mr. Feeney has been his teacher since first grade. However, in the first episode Eric tells Cory that he's going to have Mr. Feeney now that he's in sixth grade, suggesting that he did not have him in previous grades.
Continuity: The way Cory and Topanga met, how old they were when they were met and how long they have been "together" changes numerous times throughout the series.
Continuity: The main characters were in the sixth grade and eleven years old when the series began in Fall of 1993. They should have graduated from high school, therefore, in the year 2000. Instead, two years were missing from their high school careers and the writers had them graduate in 1998.
Continuity: At one point in high school, as Eric is having a conversation in the hallway, a sign behind him reading "Sex Ed" has in some shots been changed, via graffiti, to read "Sex, Ed?" but not in others.
Continuity: In the second season (Cory's first year of high school), the locker right next to Mr Turner's classroom changed owner's throughout the year. It was Frankie's, then Cory's, then Shawn's, and then Eric's. Every time it is shown there are kids in it but it belongs to a different person.