Abstract " Witley's Constructivist Model Supported By Microsoft Teams Platform And Its Effect On Mental Alertness And Performance Of Some Volleyball Skills" * Dr. Isra Osama Muhammad Khalil  * Dr. Manar Mahmoud Abd El Salam Shabaan The two researchers conducted a study entitled “Whitley constructivist model supported by Microsoft Teams platform and its impact on mental alertness and performance of some volleyball skills.” Sports Girls Zagazig Universi, The two researchers used the experimental method for its relevance to the nature of this research, through the experimental design of one experimental group, which depends on the tribal and remote measurement. The main research sample (the experimental group), in addition to a group of (10) students for the exploratory study to calculate the validity and reliability coefficients of the tools under research. The most important results reached by the researcher indicated that the constructivist model supported by Microsoft Teams had a positive impact on mental alertness, test anxiety, and the level of performance of the skills of smashing and sending from above in volleyball for third year students at the Faculty of Physical Education in Zagazig Girls, and increasing the effectiveness of e-learning platforms on Mindfulness for the volleyball course, and the constructivist Wheatley model supported by the Microsoft Teams platform has a positive impact on the performance level of the smash hit and serve from above skills in volleyball for third year students at the Faculty of Physical Education Zagazig Girls, The researcher recommends the use of Wheatley constructivist model because of its effective impact when teaching the skills of smash hit and serving from the highest confrontation in volleyball, mental alertness and reducing test anxiety for third year students in the Faculty of Physical Education Girls Zagazig University. In the educational process of the volleyball course in line with the modernization and educational development, including the strategy of the constructivist Wheatley model., holding training courses for students on how to use and access e-learning platforms and how to create and use personal accounts and use them in the educational process.