National Academies of Sciences, Engineering, and Medicine; Division of Behavioral and Social Sciences and Education; Board on Science Education; Board on Children, Youth, and Families; Committee on Guidance for K-12 Education on Responding to COVID-19; Standing Committee on Emerging Infectious Diseases and 21st Century Health Threats; Enriqueta C. Bond, Kenne Dibner, and Heidi Schweingruber, Editors