Several important economic concepts appear in the business curriculum designed for secondary schools in New York State. This manual assists the teacher by providing brief and simple definitions of major economic concepts, noting the implications of those concepts for business, and suggesting strategies that can be used to teach the principles and topics to secondary school students. An effort has been made to include a variety of methods and ideas, ranging from very simple descriptive exercises that can be completed by the average student in a few minutes to more challenging analytical problems that might require several days or even weeks to complete. The concepts addressed are: scarcity, opportunity cost and trade-offs, productivity, the market system, supply and demand, competition and market structure, income distribution, profit, capital formation, the role of government, and economic tools. (GEA)