Okla. Stat. tit. 70, § 16-111.1
Twenty percent (20%) of the funds allocated for textbooks in Section 70-16-114 of this title may be used by a school district for supplementary textbooks and other instructional materials other than those selected and listed by the State Textbook Committee.
Laws 1974, SB 113, c. 124, § 1, emerg. eff. May 3, 1974; Amended by Laws 1976, HB 1896, c. 99, § 4, emerg. eff. May 11, 1976; Amended by Laws 1993, HB 1298, c. 229, § 12, emerg. eff. July 1, 1993.