The Competency-based Middle School Program (grades 6-8) and the Competency-based Secondary School Project (grades 9-11) were funded by the South Carolina State Department of Education under the Elementary Secondary Education Act Title IV-C. These programs were to provide instruction based on the principles of mastery learning in helping middle school students gain the necessary skills in language arts, mathematics, science, and social studies to continue learning in the school environment, and to equip secondary school students with skills in language arts, mathematics, consumer economics, and citizenship that they will need as citizens, consumers, and employees. Evaluation utilizing comparison group designs were conducted, and compared the performance of students receiving corrective instruction with an equivalent control group who had not. Results of analysis of data from locally developed summative tests revealed positive trends in the attainment of competencies in mathematics (grades 6, 7, 8, 9, 10), science (grades 6, 8), social studies (grade 6), language arts (grades 9, 10, 11), and consumer economics (grade 9), but not in language arts (grades 6, 7, 8), science (grade 7), social studies (grades 7, 8), and citizenship (grade 9). (Author/RL)