Ohio Rev. Code Ann. § 5709.07
(A) The following property shall be exempt from taxation:
(1) Real property used by a school for primary or secondary educational purposes, including only so much of the land as is necessary for the proper occupancy, use, and enjoyment of such real property by the school for primary or secondary educational purposes. The exemption under division (A)(1) of this section does not apply to any portion of the real property not used for primary or secondary educational purposes. For purposes of division (A)(1) of this section:
(4) Public colleges and academies and all buildings connected with them, and all lands connected with public institutions of learning, not used with a view to profit, including those buildings and lands that satisfy all of the following:
(D) As used in this section:
(3) "Qualifying joint use agreement" means an agreement that satisfies all of the following: