The State Superintendent of Schools shall have general supervision of the free schools of the state, and shall be the chief executive officer of the state Board of Education. He shall be charged with the general supervision of all county and city superintendents of free schools and of county and district boards of education within the state, except as provided in article nine, chapter six of this code. He shall prescribe the forms and cause to be prepared and printed all blanks necessary for carrying out the details of the school system of the state, and of the rules of the state Board of Education, so as to secure the uniform operation of the same throughout the state. In respect to general school statistics, such forms and blanks shall conform as nearly as may be to the forms and blanks recommended by the United States bureau of education. The state superintendent shall also cause such forms and blanks to be forwarded to all school officers and other persons whose duty or right it is to use them.