In the article, the authors introduce the pedagogical criteria of professional suitability of the teacher's personality compiled by him. Research has shown that teacher self-confidence increases with age and teaching experience, forming professional qualities that shape dynamism, that is, the ability to control oneself and one's students. Day by day, the teacher realizes his moral and professional norm. Acquires the ability to analyze various pedagogical situations, to control himself in his professional manifestations. Satisfaction with everyday life, striving for the future directly depends on professional satisfaction. However, with a further increase in age and work experience, gaining poise and self-confidence, the teacher and the teacher begins to experience difficulties in understanding students and students. The article presents a scheme of age periodization in the periodization of a teacher's professional activity, adopted at one of the international symposia and presented in the book by A.K. Bolotova "Development of Psychology".