Consumer decision-making and its consequences for individual consumers and societal groups are examined in this economic unit for secondary school students. Seven lessons focus on developing an understanding of the concepts of scarcity, supply and demand, resources, choice, price, and interdependence and on fostering an economic way of thinking. In each lesson, a short lecture precedes several activities which draw on student classroom behavior to illustrate basic economic concepts. Two optional lectures discuss the costs and benefits of product improvement and consumer protection laws. A comprehension test, test answer sheet, test item analysis, and teacher background readings for each lesson are provided in the appendix. (LP)