A. GEMINO, Cecile; GEMINO, Jefren; TAN, Zelmae Mercado Tan1. Validation of Supplemental E-Book as Alternative Delivery Mode in Teaching Mathematics for Grade 6 Pupils. International Journal of Education, Research, and Innovation Perspectives, Philippines, v. 2, n. 5, p. 32–39, 2026. DOI: 10.5281/zenodo.20018160. Disponível em: https://ijerip.erio.org.ph/index.php/articles/article/view/576. Acesso em: 4 may. 2026.