The board shall be the exclusive governing body of the school and shall promulgate rules and regulations required for the administration and operation of the school, consistent with the provisions of this chapter. The emphasis of the school shall be on the education and training of students in the performing, visual and literary arts and in the humanities, but this emphasis shall not preclude the teaching of those liberal arts and science courses, math and science deemed necessary by the board to provide students with a well-rounded education.