IMPACT OF SUDDEN TRANSITION TO ONLINE CLASSES ON STUDENTS’ LEARNING EFFECTIVENESS AT ELEMENTARY SCHOOL LEVEL: A QUANTITATIVE STUDY. IJSSB [Internet]. 2026 Mar. 25 [cited 2026 Sep. 22];4(3):1943-51. Available from: https://ijssbulletin.com/index.php/IJSSB/article/view/2395