The kids are in the middle of tough mid-term exams. Screech convinces Mr. B. to throw a post-mid-term party for the students but actually it will be a surprise 10th anniversary celebration for him. Ryan, Nicky and Eric get a rude awakening in home economics class—they have to bake a lemon meringue pie for their mid-term grade. The boys buy a pie at the Max and turn it in. They get an "A" on it. Screech tastes it and gives them the job of baking a cake, Belding's favorite food, for the big party. Meanwhile Maria blows off studying with Katie and Rachel when Sean Pierce asks her out. Sean asks Maria to help him with his take-home Spanish mid-term. She agrees, despite her study schedule with the other girls. When Maria does study with them, her mind is still on Sean, who calls her up. She leaves to go out with him again. Rachel and Katie think he's using her. The boys plan to raise $150 for a cake, saying it's a gift for Mr. Belding. The girls contribute money, but they want to buy Mr. B. a tie instead. Sean offers to buy it for them. Maria trusts him and gives him the money. The boys make up some sample cakes for Belding to try and they're all awful. They confess their deception to Screech, who is unhappy with them. The guys promise him that they'll come up with a cake, though. Maria brings back the tie that Sean bought, but Katie and Ryan recognize it as a cheap one they saw on sale. They try to tell Maria about Sean's dishonesty, but she thinks they are jealous of her relationship. Maria has a tough time with her history midterm and gets a "D." Sean doesn't seem to care though, he's just happy about his "A" in Spanish. At Mr. Belding's party, Maria asks Sean about the money for the tie. He admits what he did but says he needed the money for an emergency—which turns out to be a new cell phone. Maria breaks up with him and keeps his cell phone, which she gives to Mr. Belding as a gift. The boys wheel in a big cake that is lopsided and funny-looking, but surprisingly, it tastes good.