Hutauruk, Renni Verawati, Iriwi L.S. Sinon, and Sri Rosepda Br Sebayang. “Analysis of The Effectiveness and Learning Activity of Students Through Online Physics Learning During the Covid-19 Pandemic”. Kasuari: Physics Education Journal (KPEJ) 6, no. 1 (December 3, 2023): 57–70. Accessed June 24, 2026. https://journalfkipunipa.org/index.php/kpej/article/view/245.