Trang Anh Kiet, and Trang Anh Kiet. “LEARNING MATHEMATICS THROUGH ENGLISH IN VIETNAMESE LOWER SECONDARY EDUCATION: COGNITIVE AND LINGUISTIC DEMANDS, EFFORT INVESTMENT, AND PEDAGOGICAL DIRECTIONS”. Journal of Education Management , vol. 18, no. 8, Aug. 2026, https://jem.naem.edu.vn/index.php/jem/article/view/618.