Okla. Stat. tit. 70, § 11-103.6a
The curriculum adopted by the State Board of Education for implementation by the beginning of the 1993-94 school year shall be thoroughly reviewed by the State Board every three (3) years, and the State Board shall implement any revisions in such curriculum deemed necessary to achieve further improvements in the quality of education for the students of this state.
Laws 1989, 1st Extr. Sess., HB 1017, c. 2, § 7, eff. April 25, 1990.