This document introduces markets and how they work. It defines a market as any place or mechanism that brings together buyers and sellers to trade or exchange products. Markets are important because they determine prices, allocate scarce resources, and allow consumers to express preferences and producers to earn profit. Different types of markets are discussed, including housing, stock, labor, and commodity markets. Students are then asked to investigate specific markets to identify reasons for changes in prices, such as an imbalance between supply and demand.