IMPACT OF SUDDEN TRANSITION TO ONLINE CLASSES ON STUDENTS’ LEARNING EFFECTIVENESS AT ELEMENTARY SCHOOL LEVEL: A QUANTITATIVE STUDY. International Journal of Social Sciences Bulletin, [S. l.], v. 4, n. 3, p. 1943–1951, 2026. Disponível em: https://ijssbulletin.com/index.php/IJSSB/article/view/2395.. Acesso em: 11 nov. 2026.