Implementasi Model Pembelajaran Berbasis Masalah Menggunakan Powerpoint Materi Stoikiometri Untuk Menigkatkan Hasil Belajar Siswa: Implementation of Problem Based Learning Model Using Powerpoint on Stoichiometry lessons to Improve Student Learning Outcomes. st [Internet]. 2019 Feb. 13 [cited 2026 May 1];2(1):279-83. Available from: https://talentaconfseries.usu.ac.id/index.php/st/article/view/358