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