Okla. Stat. tit. 70, § 1210.513

Participation in National Assessment of Educational Progress - Evaluation of state core curriculum standards. A. In order to assist in the nation's evaluation of the condition and progress of education, and in order to provide comparative interstate information on student performance, beginning July 1, 1997, the State Board of Education shall ensure the participation of the Oklahoma public school system in the National Assessment of Educational Progress. The results of this assessment shall be included as a separate result in annual reports on the Oklahoma State Testing Program. B. The State Department of Education shall utilize the services of at least one qualified independent entity to conduct an evaluation of the state core curriculum standards at every grade level or, in high school for every subject, in which a criterion- referenced test is administered, and shall report the results to the Legislature by February 1, 2000.