from wikipedia
The first three NPEA's were founded in 1933 by the Minister of Education Bernhard Rust in Plön, Potsdam, and Köslin. The schools responded directly to the Reich Ministry for Education, rather than to any states like regular schools. From 1936, the NPEA's were subordinated to the Inspector of the National Political Institutes of Education and SS Obergruppenführer August Heissmeyer. From 1939, they were part of the Hauptamt Dienststelle SS-Obergruppenführer Heißmeyer. Therewith the schools were under the direct influence of the SS and Heißmeier pressured teachers to join this organization. He also considered introducing uniforms and ranks similar to the SS among students and teachers. By 1941, there were a total of 30 NPEA's with 6,000 students enrolled in all of Nazi Germany. In 1942, there were 33 schools- 30 for boys and 3 for girls. By the end of the war 43 schools existed.