PAULUS NAINGGOLAN; BORNOK SINAGA. Development of Learning Videos to Improve Students’ Ability to Understand Mathematical Concepts on Polynomial Material. JURNAL RISET RUMPUN ILMU PENDIDIKAN, [S. l.], v. 2, n. 1, p. 228–239, 2023. DOI: 10.55606/jurripen.v2i1.1181. Disponível em: https://prin.or.id/index.php/JURRIPEN/article/view/1181. Acesso em: 1 may. 2024.