ZEROUK, Saadia. “Acquisition of Cognitive Concepts - Mathematics Concepts As a Model - The Child of the Tangible Operations Stage Has a Conceptual Approach to the Cognitive Theory Perspective (Piagi Jean, Vygotsky Lev, Brunner Jerome).”. Social Sciences Journal 10, no. 4 (1): 148-167. Accessed November 22, 2024. http://journals.lagh-univ.dz/index.php/ssj/article/view/2835.