تدريس مادة الكيمياء باستراتيجية الرؤوس المرقمة معا و أثرها في تحصيل طالبات الصف الثاني المتوسط و تنمية تفكيرهن التأملي

الملخص EN

The research aimed at investigating the impact of numberd heads strategy in the achievement of intermediate second grade students in chemistry and developing their contemplative thinking to achieve the aim of the two null hypo theses were set for the purpose of verification, the sample was selected from second , intermediate.

the number of (66) was divided into two groups; experimental group of (34) pupils and control group of (32) students .

the researcher , constructed two tools the first tool was an achievement test for chimestry in cluding 30 paragraphs of objective test using muliti- pul choice with four alternatives and it was ensared , its validity and ralidity and reliability the data were analyzed by using t- test formula for two independent samples and the findings showed there is statistically significat differences at the level of(0.05) signifinece between the mean score of students in the two groups .

the difference is for the benefit of the experiemental grnl in the achievement test, and in post text of contempiative skills.