An act to amend the last paragraph of sections two and nine, of act numbered thirty-three hundred and seventy-seven, entitled "an act to provide for the promotion of agricultural and vocational education; to provide for cooperation with provinces, cities, and municipalities in the promotion of such education in agriculture, commerce, trades, and industries; to provide for cooperation with the university of the philippines and other insular institutions in the preparation of teachers of vocational subject; to appropriate funds and regulate their expenditures, and for other purposes," and to insert a new section in said act to be known as section eleven-a