The public schools of Oklahoma shall consist of all free schools supported by public taxation and shall include nurseries, kindergartens, elementary, which may include either K-6 or K-8, secondary schools and technology center schools, not to exceed two (2) years of junior college work, night schools, adult and other special classes, vocational and technical instruction and such other school classes and instruction as may be supported by public taxation or otherwise authorized by laws which are now in effect or which may hereafter be enacted.
Okla. Stat. tit. 70, § 1-106