فاعلية وحدة تعليمية مطورة بمقرر العلوم في ضوء متطلبات التوجهات الدولية لدراسة الرياضيات و العلوم (TIMSS)‎ لتنمية الاستيعاب المفاهيمي لطالبات المرحلة المتوسطة

Abstract EN

This study is aimed to investigate the effectiveness of Adeveloped Educational Unit in 8 th Science course in the light of trends in international mathematics and science study (TIMSS) In Developing the conceptual understanding for intermediate stage students in Riyadh.

the study used the experiment method (quasi-experimental design) which involves two groups : control group (35) and expermintal group (35), the instruments of the study included :Aconceptual understanding test (Explaining, Interpreting and applying).and Adeveloped Educational Unit in the light of trends in international mathematics and science study (TIMSS) consist of two dimentions : content domain (25% physic) and cognitive domain (35%knowing, 35% applying and 30% reasoning), the sample is consisted of 70 students,divided into two groups, the results of the study revealed that there is a statistically significant difference between the mean scores of expermintal group and control group in the post application of conceptual understanding test .therefor,it was recommended that building Adeveloped Educational Unit in 8th Science grade in the light of trends in international mathematics and science study (TIMSS) in biology, chemistry and geology, training science teachers to implement cognitive domain(knowing, applying and reasoning) in their teaching practicies.