Dewey's pragmatic education thought has produced the most extensive and profound influence not only in the United States, but also in other countries. Encyclopedia americana once said, "Dewey is undoubtedly the most famous of all American educators, both at home and abroad." Throughout the first half of the 20th century, Dewey's pragmatism education thought dominated the education stage. The spread of pragmatic educational thought has greatly impacted the traditional school education, brought new excitement and vitality to school education, and changed the whole educational theory and practice.