Hamed Kazem Hamad Al-Khafaji. The Effect of Differentiated Learning Method Learning to Collaborate in Learning Some Skills of Football And keep them . ms [Internet]. 2019 Sep. 30 [cited 2025 May 15];18(3):367-76. Available from: https://www.jcopew.uobaghdad.edu.iq/index.php/sport/article/view/1599