Was a Swiss psychologist born in August 9, 1896 and died on September 16, 1980 known for his work on child development. Piaget place great importance on the education of children. As the director of the international Bureau of Education, he declare in 1934 that only education is capable of saving our societies from possible collapse, whether violent, or gradual. His theory of child development is studied in pre service education programs. Piaget created the international center for Generic Epistemology in Geneva 1955. Jean Piaget was the great pioneer of the constructivist theory of knowing.