On the basis of documents relating to school law, the educational policies for ethnic minorities in Germany, Czechoslovakia and Poland during both the interwar period (1918–1939) and today are compared. The aim of this cross-temporal and cross-national comparison was to identify basic patterns of educational policy towards ethnic minorities in the three compared countries, as reflected in the school laws and regulations, showed both commonalities and differences. It underwent a change from the interwar period to today, but at the same time continued some of its traditions up to the present.