Abstract
The study aims to identify the effect of the strategy of the concentrated lists in the achievement of second grade students in science. The researcher adopted the experimental method as the appropriate method for the research procedures. The research community consisted of middle schools for girls in Karbala governorate, (32), and the second was a control group that was studied in the usual manner. The number of female students was 34, and the researcher rewarded between the two research groups in some variables, For students measured in months and the collection of parents and students degrees in science at the end of the first semester (first course) And the degrees of testing the previous information in the science and intelligence test), (The test of two independent samples, the square of Kai, the coefficient of difficulty and ease of paragraphs, the coefficient of discrimination, the effectiveness of alternatives and the equivalence of Kyodar_ Richardson 20) and the magnitude of the effect) Students of the control group in the achievement test, ie, there is a difference of statistical significance at the level of significance (0, 05) and for the benefit of the experimental group.
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