This teaching guide begins with an explanation of the role of money in the economy, focusing on its circulation or exchange. The use of money as a unit of account, a store of value, and a medium of exchange are explained. Three brief teaching units are included. The grade K-2 unit, "Money Counts," provides games and activities which develop the concept of money and its use as a medium of exchange. "Who Needs Money?" is a unit intended for grades 3 and 4. It provides 7 activities which highlight the use of money as a store of value, a measure of the value of services, and a facilitator of exchange and interaction. A secret code "money message" worksheet is also provided. The grade 5-6 unit, "Bingo! It's Money!" provides a classroom trading experience, a product manufacturing activity, a discussion, and a money bingo game to help older students explore the role of money in our economy. (JDH)