This book opens with an exploration of the fundamental trilogy of economics - scarcity, choice, and cost. Students then examine the broad social goals of an economy in preparation for lessons treating many topics new to the precollege level such as the stock market, public choice, and aggregate supply and demand. The set of 20 lessons include: (1) "Scarcity, Choice, and Decisions"; (2) "Broad Social Goals of an Economy"; (3) "A Market in Wheat"; (4) "The Market Never Stands Still"; (5) "Markets Interact"; (6) "Price Controls: Too Low or Too High"; (7) "Price Changes Matter"; (8) "The Stock Market: Risks and Rewards"; (9) "Getting More or Using Less"; (10) "Learn More, Earn More"; (11) "Rich Man, Poor Man"; (12) "Public Goods and Services"; (13) "Third-Party Costs and Benefits"; (14) "Public Choice: Economics Goes to Washington and into the Voting Booth"; (15) "When There Isn't Pure Competition"; (16) "Until the Last Unit Equals"; (17) "The Circular Flow of Economic Activity"; (18) "Economic Ups and Downs"; (19) "Aggregate Supply and Demand: The Sum of Their Parts, and More"; and (20) "Money, Interest, and Monetary Policy." Each lesson includes core concepts, objectives, materials needed, a lesson description, procedures, and suggested evaluation. (EH)