فاعلية برنامج إلكتروني قائم على مدخل التعليم الواقعي للرياضيات في تنمية مهارات التفكير الناقد لدى تلاميذ المرحلة الإعدادية
The research problem lies in low critical thinking skills of preparatory stage students. Research hypotheses: There is no statistically significant difference between the average scores of the experimental and the control groups in the post test of critical thinking skills (skills as a whole and its sub skills separately). Research sample: The sample was randomly selected from the first grade preparatory students in port said. The sample consisted of two groups, the experimental group students number is 50 students from Al-Obour preparatory school for boys and Al-Marwa preparatory school for girls, and the control group students number is 52 students from Al-Nasr school preparatory for boys and Al-Zohour school preparatory for girls. Research steps: 1) A theoretical study of the concept of critical thinking skills. 2) Preparing the tools and research materials. 3) Adjust the measurement tools by presenting them to a group of arbitrators. 4) Determining the effectiveness of electronic program based on realistic mathematics education approach in developing critical thinking skills of preparatory stage students. 5) Conducting research statistics and draw conclusion and interpretation. 6) Formulating some recommendations according to the research results. (Published abstract)