Notwithstanding the provisions of RCW
79.11.010 or any other provision of law, any school district or institution of higher education leasing land granted to the state by the United States and on which land such district or institution has placed improvements as defined in RCW
79.02.010 shall be afforded the opportunity by the department at any time to purchase such land, excepting land over which the department retains management responsibilities, for the purposes of schoolhouse construction and/or necessary supporting facilities or structures at the appraised value thereof less the value that any improvements thereon added to the value of the land itself at the time of the sale thereof.