KhazrajiInstr. Ph.D. N. The effect of Strategy ofsimilarities in the development of visual thinking for mathematics at the primary school pupils. UJHSS [Internet]. 1Jun.2018 [cited 20Nov.2019];(225 (3):55-6. Available from: http://alustath.uobaghdad.edu.iq/index.php/UJIRCO/article/view/202