This study aimed to identify (the effect of self-questioning in numerical sense among middle school students). Two middle-class people were chosen in the (intermediate school for girls) affiliated to the education of Nineveh Governorate, to represent one of them is an experimental group that is taught according to (self-questioning) and their number (46) students and the other is a group of officers who study in a regular way. It reached (40) students, thus, the number of individuals appointed

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... o study (86) students. Equivalence between the two groups of studies was in variables: [time age, degree of intelligence, previous knowledge] To achieve the objectives of the study, a test of numerical sense composed of (24) paragraphs was confirmed as valid and reliable. Statistical data were processed using the Spss program. The results of the study showed that there are statistically significant differences between the mean scores of female students in the two groups in the numerical sense test in favor of an experimental group.