PENGARUH PENDEKATAN OPEN ENDED BERBASIS MEDIA PAKAPIN (PAPAN KANTONG PINTAR) TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS I SD. JS [Internet]. 2023 Sep. 27 [cited 2026 Mar. 27];7(4):659-68. Available from: https://jurnal.unimed.ac.id/2012/index.php/js/article/view/48211