摘要：Öz This research aims to examine a suggested program based on student activity for developing mathematical thinking skills for first year preparatory pupils in Israel and for measuring the effectiveness of a proposed program. The researcher uses the experimental approach to examine the effect of the proposed program on seventh graders in Israel and the study relied on the mathematical thinking test and on the proposed teaching program. The sample of the study consisted of 136 male and female students. The experimental group consists of 66 male and female students, and the control group consists of 70 male and female students. The experimental treatment of the results led to the following conclusions: - There are significant differences between means of pre-and post-test scores of experimental group on mathematical thinking. - There are significant differences between means of post-test scores of experimental and control groups on mathematical thinking the program achieved high effectiveness in developing mathematical thinking skills. The importance of the research lies in the fact that it benefits teachers in identifying the levels of mathematical thinking for their students, which provides an opportunity to develop them, and to know the importance of mathematical thinking and its exploitation in the educational process.
