The governing board of each district is encouraged to develop aims and purposes of aviation education designed to include: (a) integration of appropriate aviation concepts throughout the elementary school with units of instruction in science, social studies, and arithmetic; (b) aviation experiences in junior high schools in the areas of social studies, science, and arithmetic; and (c) elective courses in senior high schools and four-year high schools including air transportation, vocational training, economic, social and political implications of aviation, the science of flight, history of aviation, and flight experience where appropriate airports, planes, and pilots are available, and the need for this instruction is indicated.