Al Yazeedi, R., and M. shahat. “The Effect of Using the Six-Dimensional Strategy (PDEODE) on the Academic Achievement of Sixth-Grade Female Students in Sultanate of Oman”. International Journal of Research in Educational Sciences., Vol. 6, no. 3, June 2023, pp. 327 -64, https://iafh.net/index.php/IJRES/article/view/413.