The purpose of the study was to investigate the relationships between personality and motivational variables and music teaching success criteria. The success criteria investigated were class mean residual gain scores of pupils and teacher ratings by pupils, building principals, supervisors, peers, and teachers themselves. The problems considered in the study were the relationships among the success criteria; the relationships and interrelationships of the personality variables and motivational variables; personality profiles for successful and unsuccessful male and female music educators; and the implications of the use of personality measures for counseling and advising undergraduate music education students. The subjects of the study were 209 music educators and 73 music student teachers. The report of the study includes chapters stating the problem; surveying the related literature; describing procedures and analysis of data; summarizing the findings, which strongly related personality and motivational factors to music teaching success; and making recommendations. A bibliography and various appendixes of participating school districts, correspondence, and forms used in the study complete the report. (JH)