Mohd Abdul Aziz AA, Puteh M, Adnan M. Development Of Self-Use Module For The Problem-Solving Framework Of The Number And Mathematical Operations In The Form Of Higher Order Thinking Skill (HOTS) Using The Bar Model. J. Sci. Math. Lett. [Internet]. 2023 Nov. 9 [cited 2025 Mar. 30];11:34-4. Available from: https://ejournal.upsi.edu.my/index.php/JSML/article/view/8739