This guide to a unit on a simulation game about the stock market contains an instructional text and two separate simulations. Through directed lessons and reproducible worksheets, the unit teaches students about business ownership, stock exchanges, benchmarks, commissions, why prices change, the logistics of buying and selling stocks, and how to select stocks. The guide presents a short simulation that gives students a 5-day taste of trading, along with a longer simulation which sets up the format for following prices on the actual stock market for several months. The unit gives students a varied venue for participation and application of knowledge, skills, and decision-making abilities, while teaching them about the economics and psychology of the stock market. The guide includes information for the instructor and a glossary of relevant terms. (BT)