It covers all actions and behaviors demonstrated in the course of learning, and is the most important indicator of the quality of the educational process. This includes the ability to communicate clearly, manage the classroom confidently and competently, motivate students, use a variety of learning strategies, provide psychological and cognitive support, and monitor classroom interactions. It also includes professional activities such as good training, ethical principles and cooperation with colleagues and parents. Teacher performance is evaluated through classroom observation, student outcomes, feedback, and professional records. Improving the effectiveness of the teacher’s work is a constant goal of any education system that strives for high quality and sustainability of education.