S.D. Codified Laws § 13-37-37

Payment from funds provided for state aid for special education in any school fiscal year shall be made in twelve monthly installments on or about the thirtieth of each month. For the period July first through December thirty-first, the total of the six payments shall be one-half of the local need of the current school fiscal year less the local effort for the period July first through December thirty-first. For the period January first through June thirtieth, the total of the six payments shall be one-half of local need of the current school fiscal year less the local effort for the period January first through June thirtieth.