EXPERIMENTAL PROGRAMED INSTRUCTIONAL MATERIALS IN MATHEMATICS WERE DEVELOPED FOR THE USE OF COLLEGE STUDENTS. THE PROGRAMED UNIT WAS PRESENTED BY THREE ALTERNATIVE METHODS - READING ONLY, READING AND AURAL, AND ALMOST COMPLETELY AURAL. THE SUBJECTS CONSISTED OF 92 STUDENTS RANDOMLY ASSIGNED TO 1 OF THE 3 METHODS. PRETESTS WERE ADMINISTERED TO DETERMINE THE ACHIEVEMENT LEVELS OF THE SUBJECTS. CRITERION TESTS WERE ADMINISTERED TO EACH SUBJECT AND AN ATTITUDE QUESTIONNAIRE WAS ALSO ADMINISTERED TO DETERMINE STUDENT RESPONSE. RESULTS INDICATED THAT THE THREE GROUPS DID DIFFER SIGNIFICANTLY. FURTHER RESEARCH WAS SUGGESTED FOR EXTERNALLY-PACED CONDITIONS AND SELF-PACED CONDITIONS FOR AUDIOPROGRAMED MATERIAL. (RS)