Primary and secondary education focused on racial biology, population policy, culture, geography, and physical fitness.[352] The curriculum in most subjects, including biology, geography, and even arithmetic, was altered to change the focus to race.[353] Military education became the central component of physical education, and education in physics was oriented toward subjects with military applications, such as ballistics and aerodynamics.[354][355] Students were required to watch all films prepared by the school division of the Reich Ministry of Public Enlightenment and Propaganda.[350]