نصور ر. . “The Effect Of Using Class Activities On Developing Numerical Sense Skills Among Basic Seventh Graders (A Semi-Empirical Study In The City Of Lattakia)”. Tishreen University Journal- Arts and Humanities Sciences Series, vol. 42, no. 4, Sept. 2020, https://journal.tishreen.edu.sy/index.php/humlitr/article/view/9817.