In any county in this State in which the schools have not funds sufficient to pay all claims in cash the county board of education may, at its discretion, direct the county superintendent of education to set aside from the school funds of the county, or any of the school districts, an amount annually not in excess of ten per cent of such funds, for so many years as may be necessary to create a sufficient fund to put the schools of such county or any of the school districts on a cash basis.