Dr. Noreen Ayaz, Dr. Muhammad Saeed Khan, Syed Ghazanfer Abbas*, Anwar Mahjabeen. Impact of Concept Based Activities (CBA) on Retention of Knowledge of Students in General Science at Elementary School Level. PJSSR [Internet]. 2024 Oct. 28 [cited 2025 Aug. 13];2(4):205-1. Available from: https://policyjssr.com/index.php/PJSSR/article/view/37