OMANG, Jodelle Lopernes. Development and Evaluation of a Video-Based Supplementary Learning Material on Organic Mix Feed for Ducks and Its Effects on Grade 9 Students’ Content Knowledge. International Journal of Education, Research, and Innovation Perspectives, Philippines, v. 2, n. 6, p. 1626–1633, 2026. DOI: 10.5281/zenodo.21055412. Disponível em: https://ijerip.erio.org.ph/index.php/articles/article/view/1078. Acesso em: 1 jul. 2026.