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A1 العوامره، حمزه محمد حسن AB The study aimed to investigate the impact of a developed geometric unit based on the universal design for learning across e-learning management systems on the geometric thinking among students with learning disabilities in mathematics. The study population consisted of all fifth grade students with learning disabilities in mathematics in Asir region. The sample consisted of fifth grade students with learning disabilities in mathematics who counted (54) students and were purposively selected. They were divided into two groups: the control group (27), and the experimental group (27). The researcher prepared a test of geometric thinking through a review of the relevant literature and previous studies, and consulting the experts in special education and educational measurement. validity and reliability of the test were ensured. In addition, the researcher worked on a developed geometric unit for developing geometric thinking of students with learning disabilities in mathematics in the light of the needs of these students and their stage of age. The present study used the quasi-experimental design to examine the impact of the developed unit on geometric thinking. For the statistical purpose, Mann-Whitney Test was utilized to answer the first question, while Wilcoxon Test was utilized to answer the second question. The results revealed that there was a statistically significant difference between the control group and the experimental group subjects in geometric thinking favoring the experimental group. (Published abstract) http://search.shamaa.org/abstract_en.gif OP ص ص. 182-210 إنما 184-212 T1 وحدة مطوّرة في الهندسة قائمة على التصميم الشامل للتعلم عبر نظم إدارة التعلم الإلكتروني وأثرها في التفكير الهندسي لدى الطلاب ذوي صعوبات تعلم الرياضيات [مقال] UL 2 https://jes.kku.edu.sa/sites/jes.kku.edu.sa/files/%D8%A7%D9%84%D8%B9%D8%AF%D8%AF%20%D8%A7%D9%84%D8%AB%D9%84%D8%A7%D8%AB%D9%88%D9%86.pdf محتوى العدد (PDF)