The article is dedicated to the topical issue for the general education institutions – rate setting of teachers’ labor. Is physical and psychological fatigue of teachers mainly caused by the inadequacy of labor rate setting? This hypothesis was tested. The results of two-week time-study (April 2015) of the structure of labor time and questionning of teachers proved that labor rate settings do not predetermine physical and psychological fatigue. Any labor rate setting can be distorted by incompetent labor management of general educational institution. Overseeing by local governing bodies in the field of education and labor unions regarding quantity (formal) data of labor rate setting is obviously ineffective. Teachers` workweek should contain 18 hours, but it exceeds 30 hours instead, assuming that physical and psychological fatigue starts from the fourth lesson.