Phuong Thuy, Kieu, Pham Thi Binh, and Hoang Thi Tham. “DEVELOPMENT OF A STEM LESSON EVALUATION SCALE FOR SECONDARY EDUCATION IN VIETNAM”. HNUE Journal of Science: Journal of Educational Science 70, no. 1A (January 31, 2025): 16–28. Accessed July 15, 2026. https://hnuejs.edu.vn/es/article/view/701.