The goal of the research is to identify: (The effect of the inverted grade strategy on the ingenious thinking of fifth-grade science section students). For the purpose of verifying the objective of the research, the following null hypothesis was formulated: "There is no statistically significant difference at the level of significance (0.05) between the average scores of female students who study according to the inverted grade strategy (experimental group) and the average scores of female students who study according to the normal method (control group) in the scale of intelligent thinking." To achieve the goal of the research, the researcher B No Ed on the experimental design with partial control in conducting the experiment, and the research sample reached (58) students of the fifth grade science section, so that the students were distributed to a control and experimental group.The researcher has rewarded control and experimental research groups in variables (chronological age (in months), intelligence test, previous information test, smart thinking scale).As for the smart thinking scale, the scale was adopted from the thesis (Battle, 2018), as it included (80) paragraphs with five alternatives. The validity of the performance was verified after it was presented to thearbitrators, and the stability of the scale was conducted and the data was analyzed for the tool using statistical means (ssps). The statistical results showed the superiority of the experimental group, which studied according to the strategy of the flipped classroom, over the control group, which studied according to the usual method in the smart thinking scale of the students of the science section of fifth-grade. Through the results, the researcher made a number of recommendations and proposals.