Hitler thought that to build a strong Nazi society, youth must be taught the Nazi ideology. This can be done by imposing control over the youth both inside and outside the schools. Schools were not allowed to have Jewish or politically unreliable persons. German children were not allowed to mix up with the Jewish children. The children were provided a long ideological training. New text books were provided. Racial science was introduced to justify the racial ideas of the Nazis. Children were taught to be obedient, submissive, loyal, hate Jews and worship Hilter. They were taught to glorify aggression and violence. Youth between 10 to 14 were given special training under a Youth Organisation which stressed on physical strength, vitality and militarism.