All funds provided for in Sections 37-23-91 through 37-23-111 shall be kept in a separate fund and shall be used exclusively for the construction, operation, furnishings and maintenance of any such center so established. Any funds accumulated which are not used in any fiscal year shall remain in said separate fund for that use in the succeeding year or years. Such funds shall be expended upon order of the county board of education, and by warrant issued by the county superintendent of education.