AU - عسيري، محمد مفرح AB - The objective of the research is to determine the effect of using the 7E's learning model in teaching the geometry and spatial reasoning unit of second grade students at the middle school on developing achievement and retaining their learning effect. The case study was studied on 61 students’ samples according to the modified learning cycle (7E's) with 31 empirical sample of students. The research tools consisted of an achievement test, a teacher's guide, and student worksheets. The results showed that there is a statistically significant difference between the mean scores of the experimental and control groups in the post application of the achievement test in favor of the experimental group students and retaining the learning effect of the experimental group students. (Published abstract) http://search.shamaa.org/abstract_en.gif OP - ص ص. 317-343 T1 - إستخدام نموذج التعلم البنائي السباعي (7E's) في تدريس الرياضيات لتنمية التحصيل وبقاء أثر التعلم لدى طلاب الصف الثاني المتوسط بمدينة نجران [مقال] UL - http://search.shamaa.org/PDF/Articles/BAJepsc/55JepscVol21No4Y2020/jepsc_2020-v21-n4_317-343.pdf النص الكامل (PDF) 1 http://search.shamaa.org/fulltext.gif