Citizenship test items developed by the National Assessment of Educational Progress were administered to a large sample of 9, 13, and 17-year old students, as part of the Texas Assessment Project. The knowledge and attitudes assessed fell into three categories: (1) political knowledge: constitutional rights, governmental structure, governmental function, and general knowledge; (2) political attitudes: constitutional rights, political processes, and necessity for law; and (3) social attitudes: equal opportunity and respect for others. The resulting data are presented in terms of the percentage answering correctly for each age group. Data are also presented according to each of the following subpopulations or factors: geographic region; type of school district (rural, urban, etc.); school district size; school district expenditure per student; racial or ethnic group; sex; family income; and language spoken at home. (The 101 items administered to the students are included in the appendix.) (GDC) Aspect of National Assessment (NAEP) dealt with in this document: Procedures (Replication).