This monograph reports on the establishment of a videotape data bank designed to record activities in physical education classes for analyzing and describing teacher and student behaviors. The process of obtaining approximately 80 tapes of elementary and high schools classes and of developing procedures for efficiently describing what was contained on the videotapes is described. Introductory tables provide information on the videotaped classes by grade and sex and on the distribution of sport activities observed. Five descriptive studies are presented, each focusing on the topic selected for observation: student behavior; teacher behavior; teacher student interaction; augmented feedback; and pedagogical moves. Each chapter is prefaced with a discussion of the develoment of the descriptive system used in the study, followed by a narrative description of classroom events. Charts, tables, and graphs are used to illuminate data gathered from observation. The final chapter presents a synthesis of observations, focusing on three major themes which emerged from the study: (1) the pace at which things happen in the gymnasium; (2) the general model of teaching prevalent among the teachers; and (3) patterns of variability in the behavior of both teachers and students. (JD)