Dela Puspita, Hidayat, Dwi Novita Sari, Asnarni Lubis. The Effect of the Problem-Based Learning Model on the Mathematical Creative Thinking Ability of Seventh-Grade Students of Private Middle School Karya Pembangunan Deli Tua. JMSET [Internet]. 2026 Aug. 20 [cited 2026 Aug. 31];2(1). Available from: https://eduresearch.web.id/index.php/jmset/article/view/101