This series of 20 self-contained lessons in the study of economics, features activities that can be used with any high school economics instruction. The lessons included are: (1) Opportunity Costs; (2) Factors of Production; (3) Economic Systems; (4) Self Interest; (5) Class Struggle; (6) Economic Institutions; (7) Supply and Demand; (8) Markets and Prices; (9) Laws of Distribution; (10) Wages of Labor; (11) Interest on Capital; (12) The Law of Rent; (13) Gross National Product; (14) Business Cycles; (15) Taxation; (16) The Single Tax; (17) The Malthusian Theory and the Law of Diminishing Returns; (18) Comparative Advantage; (19) Free Trade or Protection; and (20) Economic Problems of Less-Developed Countries. Each lesson includes a theme, a sub-theme background, concepts, performance objectives, and a list of related texts. (DB)