The purpose of this study is to present the basic facts and principles involved in the organization and administration of the cooperative part-time training program in the public schools of Tulsa, Oklahoma.

The special problem which the writer chose was the study of the most prevalent postural defects of two hundred fourteen school children at Pershing Elementary School, Tulsa, Oklahoma, and to prepare and to administer a program of corrective exercises, and further to determine the progress made by the children after the application of the corrective program for the school years 1946-47 through 1947-48.

Instrumental music classes in the public schools of Tulsa, Oklahoma, have experienced a phenomenal growth during the past twenty years. Prior to this period, opportunity for instrumental music expression was limited to the high school band and orchestra,which rehearsed outside of school hours. No instruction other than this was provided and the student who wished to play in the school band or orchestra studied first from private instructors. In this study the investigator has examined a great many devices for measuring capacities and aptitudes which are known to the profession. He has attempted to evaluate these procedures in the light of sound educational philosophy. He has set forth a plan which he believes will materially improve the instrumental program through discovering unsuspected musical capacity and through sound guidance in the selection of suitable instruments.