Ohio Revised Code Title XXXIII. Education Libraries § 3323.022

(A) A full-time staff member shall be provided when there are eight full-day or sixteen half-day preschool children eligible for special education enrolled in a center-based preschool special education program.

(B) Staff ratios of one teacher for every eight children shall be maintained at all times for a program with a center-based teacher, and a second adult shall be present when there are nine or more children, including nondisabled children enrolled in a class session.

(C) Unless otherwise specified in the individualized education program, a minimum of ten hours of services per week shall be provided for each child served by a center-based teacher.