فاعلية استخدام نظرية فيجوسكي في تنمية مهارات التفكير البصري في الهندسة لدى تلاميذ المرحلة الإعدادية
This research aimed to measure the effectiveness of using Vygotsky's theory in developing the skills of visual thinking in geometry for the pupils of preparatory stage. The research group consisted of 76 pupils of the first preparatory grade at the Elshaheed Sherif Muhammad Hussein Preparatory School for Girls. The experimental processing tools were set in accordance with the philosophy of Vygotsky's theory and some models and strategies based on it, including preparing two units of the pupil's Book from the Geometric course for the first preparatory grade determined in the second semester, and preparing a teacher’s guide for teaching the two units. The "Easyclass" educational platform environment and a tutorial site for the teacher have been created https://sites.google.com/site/drnoharabie2018, and the visual thinking test has been prepared. The results of the research revealed statistically significant differences at the level (0.01) between the means scores of the experimental group pupils in the pre and post applications of the scale of visual thinking as a whole and the skills (visual perception, visual translation, visual discrimination, visual analysis, production of new visual models) separately, for the post application. In light of these results, some suggestions and recommendations were made. (Published abstract)