Can reading a book about a boy and a hen in Ghana make a difference to fifth graders in their Michigan community? Indeed, it can, and in myriad ways. At a suburban elementary school in Michigan, the authors introduced fifth graders to economic concepts in a project-based learning (PBL) unit. They began by reading aloud and discussing the picture book, "One Hen: How One Small Loan Made a Big Difference." The story takes place in a rural village in Ghana where a boy named Kojo uses a small amount of money loaned to him by a neighborhood "trust group" that includes his mother. He buys a hen with the money, then sells the eggs to pay back the trust group. The sale of more eggs allows Kojo to buy more hens. The business grows, and eventually he builds a large chicken farm and is able to loan money to other villagers who want to start businesses. The narrative is based on a true story. The book touches on the fact that, in the beginning, a large bank would not lend money to Kojo to build his chicken farm because he was poor; it also shows how Kojo eventually helped his entire impoverished village, and even his country, through the system of micro-lending. The book "One Hen" introduces students to concepts relating to microfinance (like loans, lending, interest, and investment) and to the day-to-day operations of a business (marketing, sales, revenue, cost, and profit.).