Aripin, Usman, Tanti Rosmiati, Euis Eti Rohaeti, and Wahyu Hidayat. 2025. “Learning Trajectory for Teaching the Mean Concept Using Problem-Based Learning and Animated Video”. Jurnal Pendidikan Matematika 19 (1):181-96. https://doi.org/10.22342/jpm.v19i1.pp181-196.