This report, the fifth in a series assessing educational quality in Utah public schools, focuses on students' achievements and provides performance measures based on statewide results of various testing programs and special studies. The report presents three types of data relevant to major state board of education programs (such as Utah System-Wide Planning Commission recommendations): (1) student achievement and aptitude results from the American College Testing Program (ACT), Scholastic Aptitude Test, Preliminary Scholastic Aptitude Test, Utah Statewide Educational Assessment Program, Adult Performance Level Test, Advanced Placement Program, National Assessment of Educational Progress, and the International Education Study; (2) student biographical information, educational and vocational plans, out-of-class accomplishments, and student evaluations of their high school education from the ACT student profile; and (3) information from the U.S. census and a synopsis of Utah school accreditation activities. A final chapter summarizes findings and examines five areas of performance or implications and related sources of information: academic achievement, student characteristics, educational processes, key program thrusts and goals, and education in the 1980s and beyond. Statewide and national testing program results and special studies data are provided in 39 graphs and tables. An appendix provides Utah ACT scores and standard deviations between 1966 and 1982. (PB)