Rendi Fitrah Handoko, Lily Rohanita Hasibuan, and Laili Habibah Pasaribu. “The Association Between Full-Day School and High School Students’ Concentration and Understanding of Mathematics”. EduMatSains : Jurnal Pendidikan, Matematika dan Sains 10, no. 3 (January 31, 2026): 349–364. Accessed April 30, 2026. https://ejournal.uki.ac.id/index.php/edumatsains/article/view/7851.