This curriculum guide introduces high school students to the basic principles of microeconomics. Chapter 1 provides a basic definition of economics, while chapter 2 introduces a number of important economic concepts and ideas and examines reasons for unintended or unexpected consequences of decision-making. Chapter 3 considers how individual motives and group results are related, and a model of supply and demand is described in chapter 4. Chapters 5-16 present: (1) elasticity and revue; (2) rationing and allocating; (3) the logic of choice; (4) maximizing behavior; (5) the business firm and its constraints; (6) maximizing profit; (7) efficiency; (8) problems of information, risk, and exclusion; (9) the government and economic efficiency; (10) problems in resource markets; (11) monopoly and efficiency; and (12) transport costs. Tables and charts are included. (JHP)