Or have forgotten since you don't watch the show while getting ready for school anymore?
The Max is owned by the school board.
In Save the Max, Jesse, while working as an investigative reporter for Bayside's radio station, KKTY, finds out that the gang's favorite hangout is actually owned by the school board. I guess that makes it a glorified cafeteria, in a way.
Source: hellogiggles.com
Jesse underwent counseling for her caffeine pill addiction.
At the end of the episode Jessie's Song, she mentions to her friends (who are trying to hold in their laughter at the ridiculousness of a caffeine pill addiction, no doubt) that her mother is taking her to get counseling for her problem.
Source: youtube.com
Zack is part Native American.
He had a great grandfather in the Nez Perce tribe named "Whispering Wind." Yeah, because you can totally see the Native American in the show's blonde protagonist. This was all in the episode Running Zack. It's not quite as arcane as some of the other facts on this list, but it was so absurd that I had to mention it.
Source: youtube.com
Mr. Belding had a brother who was a douche.
Remember The Fabulous Belding Boys? In that episode we got to meet Mr. Belding's douchey brother Rodd Belding, who gets the Bayside High School kids to think he's awesome and then ditches them and their field trip to hook up with a hot stewardess.
Source: zackattacks.net