Focuses on modifying personalized systems of instruction (PSI) by using competency unit testing instead of mastery testing. The algebra service courses at the University of Arizona are described. Includes data on student achievement. (MNS)

Studies effectiveness of the Pre-Professional Skills Test (PPST) in predicting subsequent grades for 9,064 Arizona applicants to teacher education programs in 1985 to 1989 and 100 students with subsequent performance data. The PPST has blocked minority students from teacher preparation programs, although correlations between score and performance…