Sidawi MGR, khazeal M tahrir eabd. The effect of using similarities strategy on developing the skills of mathematical connections for the elementary stage pupils. UJHSS [Internet]. 1Sep.2017 [cited 30Nov.2019];(221 ( 2):387-03. Available from: http://alustath.uobaghdad.edu.iq/index.php/UJIRCO/article/view/441