This report is presented in three sections: (1) Teacher Characteristics in Iowa, (II) Secondary Curriculum Distribution in Iowa, and (III) Educational Innovations in Secondary Curriculum for the North Central Association Schools of the Great Plains. The data are presented by pupil-enrollment categories and cost per-pupil categories and cover the 1966-67 school year. The tables provided should enable administrators in the Great Plains States to compare the teacher, curriculum, and innovative characteristics of their schools with other schools of similar size. The Iowa data in Section I suggest that the best qualified staff are found in school districts with total enrollments of 1,500 and above. In section II, the data indicate that as district enrollment increases, the number of course offerings available in such areas as foreign language, business, and technical and vocational education also increase. Section III presents the curriculum, organizational, and technical innovations being used or tried in the North Central accredited schools. Data also reveal that, at every school enrollment level, apparently PSSC Physics and Chemistry Study Group Chemistry are the most popular curriculum innovations. Each section contains narrative information describing a series of tables that graphically illustrate the content. (Author/JH)