Muhammad Jamil, Imran Riaz Chohan, Muhammad Jafar Ali. UNPACKING THE 4CS: THE QUALITATIVE CONTENT ANALYSIS OF 21ST CENTURY LEARNING SKILLS IN PHYSICS TEXTBOOK (GRADE IX). JSRD [Internet]. 2025 Feb. 20 [cited 2025 Jul. 1];6(1):37-49. Available from: https://www.jsrd.org.pk/index.php/jsrd/article/view/348