Nguyen Mau Duc, Dang Thanh Tra, Nguyen Nhat Linh, and Nguyen Thi Anh Thu. 2026. “ENHANCING TEACHERS’ DIGITAL COMPETENCE THROUGH A DIGITAL LEARNING RESOURCE ECOSYSTEM FOR THE ‘SUBSTANCES AND TRANSFORMATION OF SUBSTANCES’ MODULE IN GRADE 9 NATURAL SCIENCE”. HNUE Journal of Science: Journal of Educational Science 71 (6): 75-85. https://doi.org/10.18173/2354-1075.2026-%x.