Hajizah MN, 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 Jul. 2];8(3):2077-83. Available from: https://www.ijirss.com/index.php/ijirss/article/view/6945