A study conducted in 1969 endeavored to measure teacher influence on student use of nonrequired materials in the library. Seventeen students of junior high school level in two mathematics classes served as subjects. As pretest, the use of the library by all pupils was recorded during a test period of six weeks. During the eight week test period, the teacher encouraged the use of books, films, filmstrips, and periodicals in one class while the other class served as a control group. During a posttest period all students were interviewed and their use of the library continued to be recorded. The data collected supported the hypothesis that there is a relationship between teacher utilization of nonrequired media center materials and their use by the students. The bibliographies given to the students, the rating scale used, interview questions used for both groups, and explanations of statistical procedures used are appended. References follow each chapter. (DS)