The 2012 Chicago Area Study surveyed 229 center directors in 33 ZIP Codes on the West and North sides of Chicago. All centers and preschools that served three and four year olds in these ZIP Codes were eligible, except those located in the public schools. Eligible settings included preschools in churches, private schools, and community organizations as well as preschool programs and full-day care in standalone childcare centers. Fully 70% of eligible directors participated in the study. For simplicity, we refer to all participants as “centers.” We prepared a set of initial research briefs to disseminate basic study findings. Each of these briefs describes a set of data collected in the survey for the sample as a whole and across five types of ZIP Codes. The five ZIP Code types allow us to provide a basic portrait of differences in center characteristics depending on the race-ethnicity and income of the community. The five types of ZIP Codes are: (1) mixed race, low income, (2) majority non-Hispanic Black, low income, (3) majority Hispanic, low income, (4) majority non-Hispanic White, middle-income, and (5) majority non-Hispanic White, high income. The cutoffs between low/middle and between middle/high incomes are $48,500 and $70,000 respectively (about two and three times the federal poverty line for a family of four in 2011). We define a location as being a majority of one race-ethnicity if the ZIP Code is comprised of at least 50% of that racial/ethnic group (see CAS 2012 Research Brief #1 for additional details). This CAS 2012 Research Brief #2 provides a basic description of the centers and directors, including the center’s organizational structure, the demographic makeup of teachers and children, and the education level and experience of the director. Because of the study’s focus on preschool, questions about children generally focused on three and four year olds and questions about teachers focused on classrooms comprised of those preschool-aged children. The table at the end of this document presents means and proportions for the variables, and tables of supplementary information (including statistical tests) are available from the study investigators. Here we highlight some of the major results.