With exceptions so few that they stand out prominently, the professional possibilities of the school principalship have not been realized. The reasons for this state of affairs are not pertinent here. It is enough to note that schools of education are studying the situation, are attempting to analyze conditions, are trying to attract promising men and women to this calling, and are providing professional courses for them. In 1923 Cubberley, in his "The Principal and his School", outlined the duties, responsibilities, and opportunities in the elementary principalship. A year later Koos, in his "The High-School Principal", provided a cross section of the situation in our high schools. A manuscript prepared by Frank Kale Foster, Assistant professor of education, State University of Washington, gives a picture of the situation in the junior high school. A bibliography is provided. (Contains 51 tables and 52 footnotes.) [Best copy available has been provided.]