Influence of Approach Cooperatif Learning Type Jigsaw on the Mathematical Problem-Solving Ability of PGSD Students at STKIP HAMAZAR. JISIP [Internet]. 2025 Jan. 20 [cited 2026 Sep. 21];9(1):401-7. Available from: https://ejournal.mandalanursa.org/index.php/JISIP/article/view/8187