The board of managers shall prescribe the course of instruction to be followed in such school, subject to the approval of the commissioner of education. Such instruction shall include instruction in agriculture, mechanic arts, trades and homemaking and in the duties, responsibilities and privileges of citizenship. The provisions of this article and of the regulations of the education department relating to vocational instruction in the public schools shall apply to such school so far as they do not conflict with the provisions of this article and may be made applicable thereto.