Annisa Fitriani, M. Nor, and Muhammad Sahal. “Implementation Of Radec Learning Model With Quizlet To Enhance Cognitive Learning Outcomes Of Students At Smp Negeri 4 Pekanbaru On Earth And Solar System Topics ”. Journal of Science, Learning Process and Instructional Research 3, no. 2 (August 21, 2025): 35–42. Accessed November 10, 2025. https://journal.riau-edutech.com/index.php/joslepi/article/view/122.