Sheptia Y, Putri HE, Nurussama A. The Effect of Problem-Based Learning Model Assisted by Puzzle Media on Elementary Students’ Mathematical Problem-Solving Ability. Mathline [Internet]. 2026 May 31 [cited 2026 Sep. 13];11(2):491-504. Available from: https://mathline.unwir.ac.id/index.php/Mathline/article/view/1152