البحث — المستودع الرقمي العراقي

المستخلص: This research aimed ar identifying the effectiveness of differentiated instruction in developing of historical thinking skills of literary fifth - grade secondary students, researcher suggest the following three null hypotheses : 1 - There is no statistically significant difference at the level (0.05) between the mean scores of the experimental group students in the post and pre - test of historical thinking skills.2 - There is no statistically significant difference at the level (0.05) between the mean scores of the control group students in the post and pre - test of historical thinking skills.3 - There is no statistically significant difference at the level (0.05) between the average scores of the experimental group students and the average score in the control group students test of historical thinking skills.The researcher used experimental design of the two groups (experimental and control) : pre - test and post - test, according to this design , the researcher chose randomly Al Diwaniyah secondary school for Boys among the secondary schools of the Directorate of Education ofDiwaniyah for the academic year (2015 - 2016), which contained two groups of literary fifth grade and includes 66 students, and randomly selected (A) to represent the experimental group included 32 students studied with the differentiated instruction, and (B) to represent the control group included 34 students studied in the usual way.Equivalence of the two groups in the number of variables, (age in months, educational level of the parents, intelligence, achievement, last achievement in history, historical thinking skills) The researcher ties to control the extraneous variables that might influence the search results, and determined the subjects (chptures 1 - 4) in the academic book of the history of America and Europe to modern and contemporary of literary fifth grade , 4th ed. (.2011), (116) behaviorally aims were put and prepared (24) teaching plan for the experimental group and (24) for the control group, the research tool is a test of historical thinking skills of (40) items of multiple choice with four alternatives, It has been verified its validity by submitting it to a group of arbitrators specialists and constructional validity as the difficulty coefficient and the coefficient of discrimination and the effectiveness of the wrong alternatives for all items of the test, the reliability checked using Cronbach's alpha coefficient as (0.90). The experiment was performed in the first course of the academic year (2015 - 2016 AD) for the period (2/11/2015) until (7.01.2016), The researcher taught the sample himself , the results were analyzed statistically, the results showed superiority the experimental group students who have studied by differentiated instruction the control group students who have studied in the usual way in the test of historical thinking skills.In light of the research results the researcher recommended some of the recommendations, including the use of differentiated instruction in the teaching of the history of literary fifth grade, and the need to the attention of teachers' to their students historical thinking skills through the use of differentiated, and a complement to his research suggested that some of the proposals, including a similar study on the history of intermediate schools, and conducting studies of differentiated instruction reveal the effectiveness of in other variables (such as, deductive thinking , self confidence).

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