أثر استخدام أنموذج (c.a.s.e.) في التفكير الاستدلالي لدى طالبات الصف الرابع العلمي في مادة الرياضيات
The research aims to find out the effectiveness of (C.A.S.E.) model on the deductive thinking for the scientific fourth grade female students in mathematics. And to be sure of achieving the objective of this research was the formulation of the following hypothesis: “There is no significant difference statistically at the level of 0.05 between the mean scores of (experimental group) which they are studied by (C.A.S.E.) model according to the conventional method (control group) in the deductive thinking test of mathematics”. To find out the results of research, some measures are applied as following: Experimental method selected of equivalent groups of post for the deductive thinking test, it was pointed research sample of 50 students. Group B, consisting of 23 students, was chosen to be the experimental group which were to be taught mathematics through (C.A.S.E.) model, whereas group A. consisting of 27 students was chosen to represent the control group which was to be taught mathematics through the usual teaching method. The two groups are awarded by the following alternatives: (timing age by months. Intelligence, previous achievement of mathematics, previous information test of mathematics. As well as the two groups synthesis set of strategies consistent. The researcher set the scientific item and the behavioral goals and set 24 plan for each group). After that there will be the deductive thinking test of mathematics which consist of 25 item and have led verify the honesty and sincerity of virtual content on the subject and then tested on one sample none of the research sample after finish of experimentation, it was conducted on samples of the research. Then find out the validity and reliability, the difficulty- factor, discrimination power, and the effectiveness of distracters. The researcher used t-test for two independent samples and K-R20 equation to calculate the reliability of the subjective items, and the researcher used (t-test) by the statistic program (SPSS), from research sample result: “There is significant difference statistically at the level of 0.05 for interest of experimental group who studied according to (C.A.S.E.) model on control group who studied according to traditional method in the deductive thinking test, so the hypothesis of research was refused. In the light of what mentioned above, researcher concluded that the depending on (C.A.S.E.) model have a great and positive activity m the deductive thinking so the researcher find out number of recommendations and suggestions associated with the research result. (Author’s abstract)