Available on the University of Illinois PLATO IV Computer system, the Population Dynamic Group computer-aided instruction program for teaching population dynamics is described and explained. The computer-generated visual graphics enable fast and intuitive understanding of the dynamics of population and of the concepts and data of population. The basic program is a population projection model which can forecast the population of over 120 countries, based on either constant or changing 1970 demographic parameter assumptions. Basic data are 1970 total population, age composition categorized into 18 five-year intervals, period age specific fertility rates, and a cohort specific mortality rate schedule. Other programs in the series contribute additional parameters including economic development, educational development, food demand and supply, energy demand, labor force analysis, migration and urbanization, population history, and birth control use. These materials explain how to use the system; provide information on concepts, definition, and the program algorithms; and provide suggestions for the practical applications of the program. (Author/DE)