Ohio Rev. Code Ann. § 3302.021
(A) Not earlier than July 1, 2005, and not later than July 1, 2007, the department of education shall implement a value-added progress dimension for school districts and buildings and shall incorporate the value-added progress dimension into the report cards and performance ratings issued for districts and buildings under section 3302.03 of the Revised Code. The state board of education shall adopt rules, pursuant to Chapter 119. of the Revised Code, for the implementation of the value-added progress dimension. The rules adopted under this division shall specify both of the following: