Chairuddin Siregar, Irdian Ningsih. THE INFLUENCE OF TEACHING MATERIALS DEVELOPMENT ON STUDENT UNDERSTANDING IN CLASS VII ISLAMIC RELIGIOUS EDUCATION SUBJECTS AT IT MIDDLE SCHOOL. AN-NAFIS TELUK MENGKUDU DISTRICT SERDANG BEDAGAI DISTRICT. MORFAI [Internet]. 2022 Jan. 31 [cited 2024 Nov. 15];1(2):488-96. Available from: http://radjapublika.com/index.php/MORFAI/article/view/843