HUE, Ha Thanh. DIFFICULTIES IN PEDAGOGICAL ACTIVITIES OF MIDDLE SCHOOL TEACHERS IN THE NORTHERN MIDLANDS AND MOUNTAINS REGION. Journal of Science Educational Science, [S. l.], v. 69, n. 1, p. 73–84, 2024. DOI: 10.18173/2354-1075.2024-0008. Disponível em: https://hnuejs.edu.vn/es/article/view/20.. Acesso em: 4 dec. 2024.