Okla. Stat. tit. 70, § 4511

All public school districts of any type or class are authorized to establish, maintain and operate their educational program under a continuous school program, to be conducted throughout the entire year. The board of education of any school district may, after notification to the State Superintendent of Public Instruction, establish and operate in one or more of the schools within the district, or in all schools within the district, a continuous school program pursuant to the provisions of this act.