Radio is a new force which science has placed in the hands of civilization. Its potential uses are so numerous and varied that it has captivated the imagination of the entire civilized world. As a means of diffusing entertainment and information over wide areas, broadcasting has no peer. Steadily it is breaking down the barriers of isolation, broadening the horizons, and enriching the lives of countless millions of people. Within a dozen years radio broadcasting has become an important social fact in nearly every country in the world. Even the civilization of the future may depend upon the control and direction of this power. The principal purpose of this bulletin is to make available to the educational profession what appear to be the best practices in teaching by radio. The study should also be of service to professional broadcasters and occasional speakers. It is hoped that the prospective broadcaster will find a number of practical suggestions to assist them in the preparation and presentation of broadcasts. The final report is divided into five chapters. Chapter I briefly considers the purpose, procedure, and plan of the study. The second chapter treats the various forms of radio programs and the special consideration in each. The third chapter deals with certain points that should be considered in the preparation of all educational broadcasts. Publicity and supplementary aids for listeners are included in the fourth chapter; and some points that should be considered in the presentation of all educational broadcasts are treated in the fifth chapter. A bibliography is also included. (Contains 1 footnote.) [Best copy available has been provided.]