When Nick and Gabrielle enter Assistant Principal McCauley's hostile world of Saturday School, they face an impossible task: using detention time effectively.  Will Gabby's head explode before she learns all the strategies for the SAT's Critical Reading section?  Does Talking Mushroom overcome his awkward teenage angst to ask out the Misfit Indie Girl? Can McCauley catch the culprits behind the recent influx of high-grade vocab flooding his hallways?  How many cliffhangers does it take to guarantee that you'll watch the episode now?  Hopefully, no more than 4.