Abstract

بالتدقيق في محتوى هندسة المرحلتين الابتدائية، والإعدادية نجد أنه يتمثل بدرجة کبيرة في مناشط استقصائية حول العلاقات الهندسية من خلال القيام ببعض العمليات الرياضياتية کالنمذجة، والتصور، والتحويل، والمقارنة، وتصنيف الأشکال الهندسية، والتي تعتمد بدورها على الحس المکاني، و تعتبره مستهدف أساسي من مستهدفات هذه المرحلة العمرية. وتعد المقدرة على الحس المکاني هدفا لکثير من الدراسات، والبحوث التي استهدفت تحديد طبيعتها، وکيفية التعرف عليها، وقياسها من جانب، ودراسة سبل تنميتها من جانب آخر؛ ومن الدراسات والبحوث التي حاولت وصف تلک المقدرة، والمتغيرات المرتبطة بها، فضلا عن بناء اختبارات مقننة لقياسها: دراسة تزريل، وإيجوزي TzurielE Among the studies and research that attempted to describe this ability, and the related variables, as well as building standardized tests to measure it: Tzuriel & Egozi (2010) and Young, et al. (2018). It is also planned to engage learners into investigative activities centered on mathematical education software; Such as: GeoGebra, Cabri, Sketchpad are contemporary trends emphasized by the workshops and conferences concerned with the endoing of educational technology in the context of learning school mathematics. So, the current research came as an attempt to develop spatial sense and geometrical understanding using investigative activities designed in light of some modern mathematics education software. More specifically, the current research is an attempt to identify the feasibility of using the technology-based collaborative Inquiry in teaching sixth-grade geometrical content for developing level of spatial sense and geometrical understanding among a sample of sixth-grade primary school students in Alexandria Governorate. The results of the research indicated that there is a statistically significant difference between the mean scores of students in the experimental and control groups with regard to both spatial sense and geometrical understanding, and that this difference amounts to the degree of effectiveness; Where the values of the Eta square is greater than 0.15, which in turn confirms the significant effect of experimental Modeling (collaborative Inquiry activities centered on mathematical education software) in the variables of the research

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