Intended to enable Catholic educators to evaluate the reading progress of their students compared to the nation as a whole, this report presents reading achievement data for nearly 6,000 Catholic school students out of 20,000 students in grades 4, 8, and 11, assessed in 1983-84 by the National Assessment of Educational Progress (NAEP). The findings are divided into three sections. Each section presents comparisons of Catholic school student performance with the respective national average and focuses on the following characteristics: (1) findings that compare students by subgroupings related to family background and social status; (2) findings that relate to characteristics of the schools (e.g., their locations and certain information about their curricula); and (3) findings that relate to behaviors associated with academic performance (i.e., homework, television watching, student grades, and some course-enrollment information for 11th graders). (HTH)