This report summarizes the findings of the analyses of data on course offerings in the public secondary schools of the United States. The study on academic trends during the 1972-73 and 1981-82 school years focused on courses in computer application, foreign languages, mathematics, social sciences, visual and performing arts, and vocational education. Section 1 presents the rationale for the study. Section 2 describes the methodology of the analysis. In the third section, a summary highlights enrollments in each of academic years, the courses which were most frequently offered, and those with the highest enrollment. Section 4 contains a summary of the trends in subject area enrollments over the nine-year period from 1973 to 1982. Section 5 presents tables displaying the findings reported in the previous two sections. The report concludes with a technical appendix describing the survey sample designs of the 1972 and 1982 surveys. (JD)