The Effectiveness of a Proposed Program Based on The Next Generation Science Standards (NGSS) for Developing the Scientific and Engineering Practices for Chemistry Students at the Faculty of Education، Sana’a University. jhs [Internet]. 2023 Oct. 14 [cited 2026 Oct. 8];4(2). Available from: https://journals.su.edu.ye/index.php/jhs/article/view/327