PROBLEM-SOLVING AND PROBLEM-POSING LEARNING MODEL ENRICHED WITH THE MULTIPLE REPRESENTATION IN TETRAHEDRAL CHEMISTRY TO ENHANCE STUDENTS’ CONCEPTUAL UNDERSTANDING. Educ. Sci. [Internet]. 2020 Nov. 17 [cited 2026 Jan. 21];12(1):123-34. Available from: https://journal.uinjkt.ac.id/edusains/article/view/13282