This document includes the September 1978 Population Education Newsletter and a module containing background information, data sheets, and tips to help teachers develop a one or two hour lesson on population density and mobility in the United States. The module, which comprises the bulk of the document, is intended to encourage high school and college students to clarify their concepts of density, analyze changing migration patterns, consider the role of agriculture in an urban society, and plan for the future in a more populated society. Teaching procedure is outlined in a step-by-step manner, although it is stressed that steps may be followed selectively, depending upon which data sheets are used. Discussion questions are suggested, where appropriate. Examples are, "What accounts for the wide variation in population density between various states?""Do you think the land needed for urban living will increase in the future as the population grows?" Students are involved in activities including filling in questionnaires, interpreting charts, maps, and graphs, and completing work sheets. The data sheets focus on population density in the United States as a whole and state by state, land use in the United States in various years and regions, population and area of foreign countries, migration by regions in the United States during selected years, and possible future distribution of the United States population. The newsletter focuses on U.S. land use and suggests land use teaching aids. It also offers population news items and announces new population materials. (DB)