Thi Quynh Mai, D. .; Thi Bich Dao, P. .; Thai Son, N. .; Thi Ngoc Tram, N. . RESEARCH ON DEVELOPING AND GUIDING THE USE OF ASSESSMENT STANDARDS FOR SCIENTIFIC COMPETENCY IN TEACHING NATURAL SCIENCES – ILLUSTRATED THROUGH THE TOPIC OF MATTER AND ITS TRANSFORMATIONS. HNUE Journal of Science: Educational Science 2025, 70 (1A), 29-42. https://doi.org/10.18173/2354-1075.2025-0018.