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audio-visual education average daily attendance average number Brueckner casual assistance cation chapter Class A elementary Class B secondary Class C districts counties and districts county office county superintendents curriculum develop districts in Class districts in Group districts indicate Dorothy Reed elementary and secondary elementary districts report elementary school districts field of supervision full time supervisor groups of counties improvement of instruction INSTRUCTIONAL AREAS instructional program leadership National Education Association nine counties NUMBER OF COUNTIES Number of districts number of persons NUMBER OF SUPERVISORS on-call service once or twice percentage persons employed priority problems cited Qualified Personnel Reasons In-service Education report no special responsibility Rorer secondary school districts selected counties shows supervision special education special subjects staff super supervision of audio-visual supervision of guidance supervision of instruction supervision of research supervision of special supervisory organization supervisory program Table teaching three groups tricts twice a month vision visory