THE EFFECTIVENESS OF USING AUDIO-VISUAL MEDIA BASED ON POLYA’S PROBLEM-SOLVING THEORY IN ELEMENTARY SCHOOL STUDENTS’ MATHEMATICS LEARNING (CASE STUDY AT THE UPTD SDN MAULAFA). J. Innov. Technol. Learn. Educ. [Internet]. 2026 Jan. 12 [cited 2026 May 20];3(1):36-47. Available from: https://ojs.cbn.ac.id/index.php/j-itle/article/view/1919