The document describes an instrument used to measure citizenship social studies achievement and skills for 9-, 13-, 17-, and 26 to 35-year-olds in Connecticut. Based on the National Assessment of Educational Progress (ED 049 113), objectives were to collect baseline data for future use in determining knowledge, to compare results with national achievement, to use data in curricular and instructional decisions, and to encourage use of the test in evaluation and planning. 2,390 public school children and 249 adults were tested using a multiple-choice achievement test covering eight subject and skills areas, and questionnaires ascertaining individual and school-related variables. Adequate representation was sought for regional sections, urban and rural communities, both sexes, and varied socioeconomic backgrounds. Data was analyzed according to the percentage of students answering each test item correctly, the average percentage of items answered correctly for each of the subject areas, the percentage of individuals selecting each choice on each item of the student and principal questionnaires, and a comparison with students in the nation and the northeast. Findings showed that Connecticut children's scores were about the same as national and northeast levels, children who hated school or watched more than three hours of television daily achieved less, and Connecticut adults scored higher than the children or the national level. Data tables showing results by age group, variable, and age group comparisons, are included as well as the measurement instruments. (CK) Aspect of National Assessment (NAEP) dealt with in this document: Procedures (Replication).