It’s time for the most preposterous premise yet (which for this show, is saying something) as Student-Teacher week comes to Bayside, allowing Kelly to become a history teacher (responsible for covering two of the most significant events of the 20th century in one week), Lisa & Screech to become gym teachers (for…reasons?) and Belding to finally fulfill his life long dream of being Zack Morris, while Zack hones his skills at paddle balling.