“REFLECTIVE TEACHING DESIGN AND CASE ANALYSIS OF MATHEMATICS PROPOSITION COURSE IN MIDDLE SCHOOL—TAKE THE DECISION OF CONGRUENT TRIANGLE AS AN EXAMPLE ” (2023) JOURNAL OF SONGKE MATH, 6(1), pp. 12–19. Available at: https://jurnal.unikastpaulus.ac.id/index.php/JSM/article/view/1669 (Accessed: 31 July 2026).