The Effect of KWL Strategy on the Achievement of the Students of the fourth class literary in the subject of History and the Development of Cognitive Thinking skills. jperc [Internet]. 2012 Oct. 7 [cited 2026 Jun. 2];9(35):88-119. Available from: https://www.jperc.uobaghdad.edu.iq/index.php/jperc/article/view/569