Okla. Stat. tit. 70, § 70-5-131: Educational courses - Buildings and equipment

The board of education of every school district in this state is

hereby authorized to provide educational courses for all persons and

said board is authorized to provide necessary buildings, equipment,

and other facilities for such persons. Such educational courses may

include grades one to twelve, inclusive, for persons between the

ages of six (6) and twenty-one (21) years and may also include

nursery and kindergarten classes, junior college grades, vocational

and technical instruction, adult and part-time classes and other

special classes. The curricula and qualifications of teachers shall

be determined by the State Board of Education except as otherwise

provided herein. Provided, any district offering educational

courses shall charge tuition fees for such courses unless the school

district has funds available to pay the cost thereof which are not

needed to maintain the common school program.