GEMINO, Jefren. Development and Validation of Video Lessons as Supplemental Materials in Teaching Mathematics for Grade 1 Pupils. International Journal of Education, Research, and Innovation Perspectives, Philippines, v. 2, n. 3, p. 1308–1320, 2026. DOI: 10.5281/zenodo.19124807. Disponível em: https://ijerip.erio.org.ph/index.php/articles/article/view/282. Acesso em: 23 mar. 2026.