The purpose of this study was to investigate the comparative effectiveness of three out-of-class procedures designed to augment a conventional classroom instructional method in a course in the fundamentals of music for elementary education students. The procedures examined were (a) conventional out-of-class study assignments; (b) out-of-class individual use of a programed textbook; and (c) out-of- class individual use of a teaching machine program. This study was concerned with measures of achievement in fundamentals of music as taught to elementary education students at North Texas State University, Denton, Texas, during the 1963-1964 school year. The measures of achievement in music were limited to the pre-test of fundamentals of music and to the post test, interim test, and retention test of fundamentals of music.