School districts are authorized to enter into lease-purchase arrangements for the purpose of refunding or refinancing any lease-purchase arrangements then outstanding, including the payment of any prepayment of redemption premiums thereon and any interest accrued or to accrue to the date of purchase, prepayment, redemption or maturity of the outstanding lease-purchase arrangements. Until the proceeds of the lease-purchase arrangements issued for the purpose of refunding or refinancing outstanding lease-purchase arrangements are applied to the purchase, prepayment, redemption or retirement of the outstanding lease-purchase arrangements, the proceeds may be placed in escrow and invested and reinvested. The interest, income and profits, if any, earned or realized on any such investment may, in the discretion of the local school board, also be applied to the payment of the outstanding lease- purchase arrangements to be refunded or refinanced by purchase, prepayment, redemption or retirement, as the case may be. After the terms of the escrow have been fully satisfied and carried out, any balance of such proceeds and interest, if any, earned or realized on the investments thereof may be returned to the local school board to be used for payment of the refunding or refinancing lease-purchase arrangement. All such refunding or refinancing lease-purchase arrangement [arrangements] shall be entered into under, secured and subject to the provisions of the Education Technology Equipment Act in the same manner and to the same extent as any other lease-purchase arrangements entered into pursuant to that act.