Janusz Korczak is the greatest teacher-innovator, a wonderful writer, and, most importantly, his books do not have a degree of relevance tied to time, to a specific era. Korczak’s books will be read by teachers and parents, children and adolescents at all times, for these books are the synthetics of tragedy and light, soul and mind, and in aggregate ministry. Serving children, serving children's happiness . In the texts I. Korczak does not have ready-made pedagogical verdicts, he believes that the reader himself will make the right and correct decision in the difficult task of educating the growing personality. Individual works of the teacher are published in Russia for the first time .