The state board of education is designated as the state board of education as provided in the acts of congress, is charged with the duty and responsibility of cooperating with the federal board for vocational education in the administration of the acts, and is given all power necessary to such cooperation. The state board of education in submitting plans for the training of teachers, supervisors and directors of agricultural subjects, and teachers of trade and industrial and home economic subjects, as required in the acts of congress, shall provide that they shall be trained in the state colleges and state teachers colleges of Missouri, the University of Missouri, or in a school maintained in a school district of a city of seventy-five thousand or more inhabitants, insofar as their training can be provided in schools.