Tyr (Tiw) is the God of War - a Sky God and also a Sword God. His rune became the emblem for the Reich Leadership School (Reichsführerschule).
The Tyr Rune emblem was only awarded to successful graduates of the schools and was worn on the left arm of the party uniform, above the swastika armband.
According to the Third Reich publication 'Woher Stammen Die Runen?' (Where do the Runes Come From?) by Karl Theodor Weigel this was the rune of 'Higher knowledge and militant bearing' thus the rune was a perfect emblem for the school!