Bangun SE, W. L. Sihombing. The Effect of the Missouri Mathematics Project (MMP) Learning Model on Students’ Mathematical Problem Solving Ability in Algebra Material in Class VII Budi Murni 2 Catholic Private Middle School Medan. JIPH [Internet]. 2023 Jan. 31 [cited 2026 May 1];2(1):1-16. Available from: https://journal.formosapublisher.org/index.php/jiph/article/view/2827