Continuity mistake: When Tori joins the group during the final season, she and Zack date for two episodes, but they are not in sequential order.
Other mistake: In the opening credits of Season 4 (the Tori episodes), when Leanna Creel is shown, the second of her three sequence shots is in reverse (where she is sitting at the Max in a red outfit in front of a candle). In the episode where that clip is from, she was sitting to the right of the table facing left, but in the opening sequence, she is on the left of it facing right (mirrored image).
Visible crew/equipment: After the fashion show when Zack says "Sorry Lisa, I don't know what to say" an entire boom microphone assembly is visible and snatched out of view at the top of the screen.
Continuity mistake: In the 1st season (the Ms. Bliss episodes), Zack mentioned to Screech in one episode that he had good news for Screech's brother. But in the Bayside episodes, Screech confirmed being an only child (specifically said in this episode).
School Song - S4-E24
Continuity mistake: Zack messes with the piano so it will give him a chance of winning. When Tori plays it sounds like she is messing up. But immediately following that screech plays the piano with no problem and there was no time to fix the piano.
Answer: The show that took place in Indiana that you are referring to was titled "Good Morning Miss Bliss." This show only lasted one season. The kids on the show, however, were popular so they decided to create a spin-off titled "Saved By the Bell," that aired on Saturday Mornings. I'm sure they changed the location because they thought the California setting would make the show more fun and watchable for pre-teens and teens.
ACertainShadeofGreen