فعالية تدريس وحدة مطورة من منهج العلوم في تنمية مهارات القرن الحادي والعشرين لدى تلاميذ الصف الأول الإعدادي
The research objective is to study the effectiveness of teaching a developed unit of the science curriculum in developing the 21St century skills for first year preparatory students. The descriptive analytical approach and the experimental approach were used. To achieve the research objectives, a list of the twenty-first century skills that must be included in the science curriculum in the preparatory stage was prepared, and the content of the science curriculum in the preparatory stage was analyzed to know the extent to which it included the skills of the twenty-first century, a proposed conception of science curricula at the preparatory stage was also prepared and the researcher prepared, a teacher's guide and a student's activity notebook for the unit of the earth and the universe from the second semester of the first year of middle school in the light of the skills of the twenty-first century, and building a test of skills of the twenty-first century. The test was applied to the research group 120 students from four schools in the preparatory stage in Cairo governorate, consists of (60 students) representing the experimental group, and (60 students) representing the control group. The twenty-first century skills test was applied after teaching the developed unit to the experimental group to compare between the pre and post application. After the application, the results revealed the effectiveness of teaching the developed unit of the science curriculum in developing the skills of the twenty-first century skills for first year preparatory students. (Published abstract)