The effect of the self-schedule strategy (K.W.L) on the achievement and retention of learners of the sixth grade of middle school in Misan Governorate. cbej [Internet]. 2025 Jul. 24 [cited 2026 Jun. 4];30(130):199-21. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/13056