Leila Kubesch, teacher, Norwood High School, Cincinnati, OH.

Andrea Wader, parent; president, John C. Fremont Elementary PTA, Long Beach, CA.

Craig Broeren, superintendent, Wisconsin Rapids Public Schools, Wood County.

CDC: “Operational Strategy for K-12 Schools through Phased Mitigation,” “SARS-CoV-2 Transmission Associated with High School Wrestling Tournaments — Florida, December 2020-January 2021,” “Ventilation in Buildings.”

U.S. Department of Education: “ED COVID-19 Handbook Volume 1: Strategies for Safely Reopening Elementary and Secondary Schools.”

American Academy of Pediatrics: “COVID-19 Interim Guidance: Return to Sports.”

EdWeek: “CDC Releases New COVID-19 Guidance for Schools. Will It Help Them Reopen?”

CNN: “Three Arizona teachers who shared a classroom got coronavirus. One of them died.”