Pengembangan Perangkat Pembelajaran Matematika Model Pembelajaran Berbasis Masalah untuk Meningkatkan Kualitas Proses dan Hasil Belajar di SMP: Developing of Mathematics Learning Devices with Problem Based Learning Model to Improve Process Quality and Learning Outcomes of Junior High School. st [Internet]. 2019 Jul. 31 [cited 2026 May 1];2(2). Available from: https://talentaconfseries.usu.ac.id/index.php/st/article/view/544