This primer is designed to teach about the concept of census tracts. Census tracts are relatively small statistical subdivisons that vary in population from about 2,500 to 8,000 and are designed to include fairly homogeneous populations. They are most often found in cities and counties of metropolitan areas of the nation. In all, there are over 43,300 census tracts (according to the 1980 Census). Product primers are prepared primarily for college-level instructors, but can also be used for self-study. This primer includes background information, exercises designed to teach census concepts and data use skills, a presentation outline, and exercise answer keys. (DB)