This learning package presents 15 lessons on principles of economics for use by junior high school social studies classroom teachers as they develop economic education programs. The activities are keyed to the economic education color television/film program "Trade-Offs," (developed jointly in 1978 by the Agency for Instructional Television, the Canadian Foundation for Economic Education, and the Joint Council on Economic Education). Major objectives of the lessons are to give teachers a wider range of activities from which to choose, facilitate individualized and independent learning, provide experiential activities, and develop and reinforce economic vocabulary. Lesson topics focus on economic choice, factors involved in decision making, earning power, income, selling techniques, and costs and benefits. Activities involve students in class discussion, cutting out pictures and comparing prices of desired items from catalogues, creating charts and graphs, participating in simulation and other games, learning and vocabulary terms, filling-in blanks, solving word puzzles, making bulletin boards, and playing word games. For each lesson, information is presented on behavioral objectives, vocabulary, learning activities, follow-up activities, and a written and/or pictorial description of a learning center for individual and small group projects. (DB)