The research aimed to develop a proposed educational program using the strategy of differentiated education and know its impact on the level of technical performance and cognitive achievement in chest swimming and self-confidence among the students of the second year at the Faculty of Physical Education Girls - Zagazig University, They were divided into two groups, one experimental group and the other a control group of (30) students. M Education Strategy Differentiated. The most important results are: 1- The use of differentiated learning (reciprocal learning method - cooperative learning method - comparative competitive learning method) has a statistically significant impact at the level (0.05) on the cognitive and skills aspects in chest swimming and self-confidence. 2- Command learning method (the traditional method) has a positive impact statistically significant at the level of 0.05 on the cognitive and skill aspects in the chest swimming, while there are no statistically significant differences in self-confidence. 3- Increasing the effectiveness of the differentiated education strategy on the method of learning by orders in the cognitive and skills aspects of chest swimming and self-confidence. Key recommendations include: 1- Use of differentiated education strategy to master the cognitive and skill aspects in swimming chest and improve self-confidence for students of the second year of the Faculty of Physical Education Girls - Zagazig University.