Mostoles, Rosario. “Integrating Numeracy and Literacy Across the Curriculum: Challenges Encountered by Elementary Teachers of Osmeña Colleges in Promoting 21st-Century Skills, Personal Qualities, and Learner Competencies”. International Journal of Sustainability and Advanced Integrated Research 2, no. 2 (May 10, 2026): 1849–1855. Accessed September 9, 2026. https://ijsair.com/index.php/ijsair/article/view/464.