“Penerapan Problem Based Learning (PBL) Untuk Meningkatkan Higher Order Thinking Skill (HOTS) Mahasiswa Melalui Lesson Study”. NOTASI: Jurnal Pendidikan Matematika 1, no. 2 (December 31, 2023): 59–68. Accessed November 5, 2025. https://ejournal.ahs-edu.org/index.php/notasi/article/view/104.