DAQUIZ , Doris Z. Enhancing Problem-Solving Skills of Grade 9 students: Effectiveness of MATH-QUAD . Lunday: Research Journal of the Graduate School of Bulacan State University, [S. l.], v. 7, n. 2, p. 24, 2026. Disponível em: https://lunday.bulsu.edu.ph/index.php/lunday/article/view/124. Acesso em: 26 feb. 2026.