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A1 أحمد، نجلاء فائق A2 محمد، شاكر جاسم AB The research aims to find out the effect of PEDODE strategy on the acquisition of historical concepts of first intermediate grade. To achieve this goal, the researcher has put forward this zero hypothesis: there is no statistically significant difference at the level of (05,0) between the mean of the students' marks in the experimental group who study the history subject using PEDODE strategy and that of the students' marks in the control group who study the subject according to the traditional method in the post-testing on the acquisition of historical concepts. The sample of the study consists of (62 female-students) of first intermediate grade in the directorate of Baghdad education/ karkh2nd for the academic year 2016-2017. The sample falls into two groups (30) for the experimental group and (32) for the controlling group. The researcher made the two groups equivalent in several variables (intelligence testing degrees- first course history marks-students' age in months- parents' qualification). After the researcher specified the syllabus items to be taught namely the fifth and sixth chapters of the textbook "the history of ancient civilizations" / first intermediate grade for the year 2016-2017. According to the content of the textbook, the researcher pointed out 20 main historical concepts; prepared 60 behavioral goals measuring the acquisition of the concept (definition, distinction, application). She also prepared 21 daily teaching plans for each of the research groups. The researcher prepared a post-testing for the acquisition of the historical concepts of the type (multiple choice) with four choices and 60 items, tested for its validity, reliability, discrimination power, difficulty factor and wrong choices effectiveness, the researcher used the (t-test) to analyze the results of the research and applied the post-testing for the acquisition of the historical concepts on Sunday 16/4/2017. (Published abstract) http://search.shamaa.org/abstract_en.gif OP ص ص. 627-648 T1 أثر استراتيجية بديودي (PDEODE) في اكتساب المفاهيم التاريخية عند طالبات الصف الأول المتوسط [مقال] UL https://www.iasj.net/iasj/article/156049 النص الكامل (PDF) 1 http://search.shamaa.org/fulltext.gif