Ohio Rev. Code § 3321.08
Every child who has been granted an age and schooling certificate shall, until the age at which such certificate is no longer required, attend a part-time school or class for the number of hours not over eight per week that such school or class is in session, provided the board of education of the school district in which the child resides or is employed has made such school or class available. Such attendance shall be for the full term such school or class is in session, and shall begin with the first week of the school term or within one week after issuance of the age and schooling certificate. This section does not apply to children who are employed under vacation and part-time certificates only. The superintendent of schools may excuse a child from such attendance for one of the reasons provided in section 3321.10 of the Revised Code. A part-time school or class is one which shall offer to those minors who have entered industry, instruction supplemental to their daily occupations or which will increase their civic and vocational competence or both and which are taught between the hours of seven in the morning and six in the afternoon of any day except a legal holiday, Saturday, or Sunday, or between the hours of seven in the morning and twelve noon of Saturday.
R.C. § 3321.08