Nassour, R. ., and S. . . Ghosoun. “The Effectiveness of an Educational Program Based on the Activities of Mathematics in the Educational Achievement of Pupils in the Third Grade. (Semi-Experimental Study in the City of Latakia)”. Tishreen University Journal- Arts and Humanities Sciences Series, vol. 39, no. 5, Nov. 2017, https://journal.tishreen.edu.sy/index.php/humlitr/article/view/3332.