The Ohio K-12 COVID-19 Health and Prevention Guidance Document has provided schools with the following statements regarding face covering for staff, students and volunteers.
"Wearing face coverings is especially important during times of elevated community spread, particularly when social distancing is not possible. School settings are especially high risk for community spread. Although children are less likely to become severely ill, they often are carriers of the virus and can spread it to school staff or family members at home, some of whom may be high-risk. Additionally, those family members can then carry the virus to others in workplace and community settings."
"Face coverings are critical to preventing the spread of the virus from person-to-person."
Pages 13-16 of the Guidance document linked in bold below pertain to the State of Ohio's Face Covering Requirements for K-12 Schools.