Every generation of people decides three major tasks. Firstly, to master experience of previous generations, secondly, to enrich and increase this experience, and, thirdly - to pass to his next generation. Public progress became possible only because every new generation seized experience of ancestors, enriched him and passed to the descendants.Science, studying conformities to law of transmission a senior generation and active mastering by the junior generations of social experience necessary for life and labour, named pedagogics. In Ancient Greece a teacher was name the slave, set to the student, accompanying him in school, attending to him on employments and out of them. The Greek word "пейдагогос" ("пейда" is a child, "гогес" are news) can be translated as "детоводитель", "детовожатый". Pedagogics in a word for word translation from Greek - детовождение.