Al-Qadir Al chalabi, F. A., & Khazaal Al-saadi, R. R. (2019). The Effect Of Using Pirie And Kieran’s Model To Acquire Concepts At The First Year Intermediate Female Students In Mathematics. Opción, 35, 175-193. Recuperado a partir de https://www.produccioncientificaluz.org/index.php/opcion/article/view/30806