Abstract T his research aimed to know the effectiveness of the flipped classroom in developing scientific concepts and developing motivation towards learning for first year preparatory students. According to the inverse chapter for the students of the experimental group, the two measurement tools were: (1) Testing the scientific concepts included in the unit (energy) assigned to the students of (first preparatory grade), in the light of the levels of CAPS, the measure of motivation towards learning, and using the experimental method with the experimental and control groups, The two research groups were selected from among the pupils of the first year of middle school in the Matai Educational Administration, which consisted of (108) female students, of whom (54) female students for the experimental group, (54) female students for the control group, and the results reached to the effectiveness of the flipped classroom in teaching the power unit to develop concepts. The scientific study for first-grade preparatory girls in the preparatory school for girls in the Matai Educational Administration, the lack of effectiveness of the flipped classroom in teaching the energy unit to develop the motivation towards learning for the first-grade students. The first preparatory school in the preparatory school for girls in the Matai Educational Administration, and there is a statistically significant correlation between the scores of the first preparatory grade students in the scientific concepts test and their scores in the measure of motivation towards learning in the post application.