Summary of the fourth research An educational program using cort to teach thinking and its impact on cognitive flexibilityAnd some advanced skills in tennis *prof.Dr / Aml Anwar Abdel Salam Hassan The cort program uses generally familiar knowledge to enhance thinking skills, cognitive flexibility which is the true reason behind the intelligence, excellence, and distinction of exceptional people between us. Research objective: The research aims to know the effect of an educational program using Kurt on cognitive flexibility and some advanced skills (The drop shot-The Smash-the Volly- the Lob) in tennis for female students majoring in tennis at the Faculty of Physical Education, for Girls of Zagazig University. Research Methodology: The researcher used the experimental method with the post-pre-measurements for two groups, one experimental and the other one control, for its suitability of the research goal. Research Society and Sample: Representing students of the third year of the Faculty of Physical Education for Girls - Zagazig University for the academic year 2017/2018 tennis major, and they are (80) students. They were divided into two groups, one is experimental and the other is a control group consisting of (20) students, after excluding (40) students for the exploratory sample. Data collection tools and methods: skill tests, cognitive flexibility survey list, tutorial. To statistically treat the data, the researcher used: - the Arithmetic mean - the standard deviation - the median - the Torsion coefficient - the simple correlation coefficient - the "T" test. The most important results: - the effectiveness of a program using cort to teach thinking is more effective than the method of learning with orders in positively influencing cognitive flexibility and the level of performance of some advanced skills in tennis among students of the third year students who specialize in tennis at the Faculty of Physical Education for girls at Zagazig University. * Assistant Professor, Department of Games - Faculty of Physical Education - Zagazig Universit