DELA CRUZ , Marivic M.; BLANCO, Dr. Rainelda M. Master Teachers as Instructional Leaders amidst the Challenges of 21st Century Teaching Learning. Lunday: Research Journal of the Graduate School of Bulacan State University, [S. l.], v. 5, n. 1, p. 12, 2026. Disponível em: https://lunday.bulsu.edu.ph/index.php/lunday/article/view/87. Acesso em: 26 feb. 2026.