The Effectiveness of a Proposed Study Unit in Social Studies to Develop the Concepts of Preventive Education among the Seventh-Grade Students in Amanat Al Asimah(Sana’a). jhs [Internet]. 2024 Jul. 30 [cited 2026 May 4];3(3):354-82. Available from: https://journals.su.edu.ye/index.php/jhs/article/view/977