This study contains a statistical consolidation of information reflecting many of the trends and patterns becoming evident in high school aviation courses conducted across the country. For purposes of this report the term aviation relates to all courses including both aviation and space. The information reported is considered to be of value for the planning, development and operation of individual aviation and/or space education programs. The report represents the fourth major compilation of statistical data and is presented for the 1974-75 school year. Within this report is a current list of all General Aviation Manufacturers Association (GAMA) member organizations. School information, showing percentages of aviation programs as a function of school population, is presented as well as descriptive information related to a typical aviation teacher. Academic background and aeronautical qualifications of teachers are presented. Course information given includes description of program designs, course titles, course classification, content and field trips as well as student flight orientation experiences and evaluation procedures. (Author/EB)