In the nineteen-twenties and nineteen-thirties, Dalton education spread throughout the world. There is no certainty regarding the exact numbers of Dalton schools, but there was Dalton education in America, Australia, England, Germany, the Netherlands, the Soviet Union, India, China and Japan.[citation needed] Particularly in the Netherlands, China and Japan, Dalton education has remained in existence. In recent years there has been a revival of international interest, particularly in England, Germany, the Czech Republic and Slovakia.[citation needed]