Rambe M, Ritonga ZS. APPLICATION OF THE PROBLEM SOLVING METHOD IN IMPROVING STUDENT LEARNING OUTCOMES IN CLASS IV PRIVATE PRIVATE PRIMARY SCHOOL PAB 19 BANDAR KLIPPA. REKOGNISI [Internet]. 2019 Dec. 30 [cited 2025 Apr. 9];4(2):30-6. Available from: https://jurnal.unusu.ac.id/index.php/rekognisi/article/view/128