Any teacher, principal or superintendent employed in the schools of this State, supported in whole or in part at public expense, shall file within two weeks after the close of the session of such school a full and accurate report as required by law. Any person neglecting, refusing or omitting to file such report when requested by the county superintendent of education shall be liable to the cancellation of his certificate to teach by the State Board of Education and to a fine of not more than twenty-five dollars to be imposed at the discretion of the county board of education.