ABOGANDA, P.; QUITALIG, T. Multi-Grade Instruction and Pupils Academic Achievement: An Assessment. SSU - Digital Archive for Theses and Dissertations, [S. l.], v. 16, n. 1, p. 1–144, 2022. Disponível em: https://www.datd.ssu.edu.ph/index.php/datd/article/view/223. Acesso em: 5 may. 2026.