Okla. Admin. Code § 210:35-5-41
The number of children in an early childhood education class shall not exceed 20. The child:adult ratio shall not exceed 10:1. Any enrollment that exceeds 10 shall require the employment of a teacher assistant.
Added at 8 Ok Reg 2159, eff 5-17-91 (emergency)
Added at 9 Ok Reg 2371, eff 7-13-92