An individualized Computer Assisted Instruction (CAI) mastery learning format was offered to sections of Fundamentals of Mathematics and Basic Algebra courses over four semesters (two academic years). The effectiveness of this method compared to a traditional lecture approach was examined in the areas of passing the course, passing the final examination, course retention, and passing the next math course. For the Fundamentals course, no significant differences were found among methods in all of the above areas except course retention; course retention was significantly higher in traditional sections. In the Basic Algebra course, traditional sections had significantly higher pass rates and course retention rates. CAI sections had significantly higher exam pass rates. Discussion and recommendations are also included. Contains 15 references and 9 tables. (Author/WRM)