Van Duyen Em, V. .; Thi Ngan, P. . THE DEVELOPMENT OF STUDENTS’ GAINING KNOWLEDGE AND COMMUNICATIONS PERSPECTIVE THROUGH PROJECT-BASED LEARNING IN TEACHING THE CONTENT OF “NITROGEN AND SULFUR” IN CHEMISTRY 11. HNUE Journal of Science: Educational Science 2025, 70 (1A), 79-90. https://doi.org/10.18173/2354-1075.2025-0022.