“The Effect of the Implementation of Project Based Learning (PjBL) in Improving the Cognitive Learning Outcomes on the Material of Atomic Structure”. TOFEDU: The Future of Education Journal 5, no. 1 (January 27, 2026): 375–381. Accessed October 9, 2026. https://journal.tofedu.or.id/index.php/journal/article/view/1558.