The research aims to identify the impact of the constructivist learning method on: Learn the skill and cognitive performance level of dolphin swimming for juniors. - Differences between the experimental and control groups in the post-measurement of the level of skill and cognitive performance of the sample (under research) - Differences in the rate of change between the two groups (experimental and control) in the level of skill and cognitive performance of the sample (under research) The researchers used the experimental method with the experimental and control groups as it suits the nature of this research. • The sample was chosen intentionally. It consisted of (36) swimmers in some academies for teaching swimming in Sharkia Governorate for the age group under 15 years. A number of (10) swimmers were excluded for lack of regularity, in addition to (6) swimmers for the exploratory study, so that the core research sample became (20) swimmers. It was divided into two equal groups, one of which was an experimental group and the other a control group, each consisting of (10) swimmers Tools used in research measurements: - A rectameter device for measuring length (cm). - A dynamometer device to measure grip strength. (kg) - A dynamometer device to measure the strength of the muscles of the back and legs kg - A medical scale calibrated to measure weight - Included ruler to measure flexibility cm - Swedish seat -Swimming pool