The Effectiveness of a Teaching Strategy Based on the Cognitive Model of Daniel in the Development of Achievement and the Motivation of learning the School Mathematics among the Third Intermediate Grade Students. jperc [Internet]. 2019 Apr. 1 [cited 2025 May 3];16(61):136-73. Available from: https://jperc.uobaghdad.edu.iq/index.php/jperc/article/view/42