Audio-visual education is a rapidly developing area of education in California. This tremendous growth would in itself preclude using criteria for evaluating audio-visual services which did not adjust to the growth of the program. The problem of this thesis is the result of this changing situation. Are the criteria that evolved during the years 1947-50 and used by officials of the California State Department of Education for evaluating audio-visual services at the county level a satisfactory measure of the county audio-visual services required by today’s demands?