LEECH, Nancy L; GULLETT, Sophie; HOWLAND CUMMINGS, Miriam; HAUG, Carolyn A. The Challenges of Remote K–12 Education During the COVID-19 Pandemic: Differences by Grade Level. Online Learning, Boston, MA, v. 26, n. 1, 2022. DOI: 10.24059/olj.v26i1.2609. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/2609. Acesso em: 4 apr. 2026.