Everyone in the class contributed $2.00 each to invest in the stock market as part of a class project with Miss Bliss, buying stock on the internet. Zack is interested in the concept of earning a lot of money with little work involved. He learns just enough that he convinces everyone else to change from investing in an airline to investing in potatoes. This plan backfires because they bought on margin. At first they make a lot of money (about $6,000), but then they lose a lot of money (over $1,000) which means Miss Bliss will have to pay it back, since it's her account. She was just about to buy a new car, but now she won't be able to afford it after paying for the lost investment. Miss Bliss loses her temper and scolds the class. All the kids feel really bad about the whole thing and try to think of ways to pay her back. Miss Bliss thinks of a way. She brings the potatoes to school and wants the kids help her sell them to earn back the money.