The board of trustees of any State high school district may, with the approval and consent of the county board of education, provide for theoretical and practical instruction and training in military science and tactics in their high school, prescribe the grades in which such instruction and training shall be given and provide the necessary instructors and materials for the same. The State Board of Education shall establish and promulgate proper and suitable rules and regulations governing such instructions and training, and the Adjutant General shall assist and cooperate with the State Board of Education in the preparation of suitable rules and regulations to govern and control such instruction and training in State high schools and shall exercise such supervision and control of such instruction and training as the State Board of Education may approve and require. Any such high school may, under such rules and regulations as the State Board of Education may prescribe, install and maintain United States junior reserve officers training corps units.