(1) The board is charged with the authority and responsibility of exercising "general supervision over the public school system and such other public educational institutions as may be assigned by law." In the same section the constitution also provides for two other boards, the board of regents of higher education which is charged with the government and control of the Montana university system, and the state board of education, a joint board composed of the members of the board of public education and the board of regents. The state board meets twice a year to plan and coordinate "policies and programs for the state's educational systems."