Okla. Stat. tit. 70 § 5-106A
A superintendent, administrator, teacher, or person providing support services may contract with more than one school district to serve as superintendent, administrator, or teacher, as appropriately qualified, or to provide support services for each contracting district. The contract may be mutual with all the districts as parties, or the contracts may be separate; provided, that a superintendent, administrator, teacher, or person providing support services may not enter into contracts with more than one school district without the assent and knowledge of all the school districts with which they are contracting. The districts who contract either mutually or separately with a superintendent, administrator, or teacher, or with a person to provide support services may enter into agreements upon such terms and conditions as the parties may agree and may include terms related to the division of payments for items including, but not limited to, payment of benefits or travel for the superintendent, administrator, teacher, or person providing support services. Unless otherwise provided by contract, each district shall pay into the Teachers' Retirement System of Oklahoma the district's pro rata share of the payment required to be paid into the System on behalf of the employee.
Okla. Stat. tit. 70, § 5-106A