Ritonga SYK, Maryanti I. The Effect of the Student Facilitator and Explaining Learning Model on the Mathematics Learning Outcomes of Harapan Mekar Middle School Students in Medan. EJR [Internet]. 2023Jan.9 [cited 2025Jul.5];2(1):25-9. Available from: https://jurnal.larisma.or.id/index.php/EJR/article/view/315