The purpose of this project was to relate mathematics studies to the students' natural enthusiasm for popular music and favorite performers. Learning modules rather than lesson plans were used as the teaching approach in the experimental music-mathematics classes. Stated objectives of the project were (1) to motivate students to learn to code and decode; (2) to develop a teaching and learning approach utilizing teachers, student assistants, and administrators; and (3) to develop tests and instructional modules for the use of secondary schools. Eighth-grade students in this project were taught one semester in a regular mathematics class and one semester in a music-mathematics class. Data for this study were collected from three major sources: (1) students (experimental and control group), (2) project staff, and (3) records available at the project office. This report contains the data and interpretations obtained from attitudinal and interest questionnaires, from observations and interviews, and from the pre- and post-test scores on standardized tests as well as teacher-made tests. The report concludes with 11 major recommendations. Among the recommendations are: the continuation of the project, improved criteria for the selection of control and experimental groups, further study of the instructional modules by the mathematics department of the school system, and the dissemination of these modules to other schools in the district. (JBW)