Hajizah MN, Salsabila E, Hadi I, Meganingtyas DEW. The development of didactical tetrahedron design on learning integers to improve algebraic thinking skills. ijirss [Internet]. 2025 May 12 [cited 2025 Dec. 13];8(3):2077-83. Available from: https://ijirss.com/index.php/ijirss/article/view/6945