His appointment was specifically to teach first year undergraduates, for neither Kronecker nor Weierstrass lectured at this level. Wangerin remained in Berlin until 1882 when he was offered the position of ordinary professor at the University of Halle-Wittenberg.
Kanyang appointment ay partikular na magturo sa unang taon undergraduates, para sa alinman sa Kronecker ni Weierstrass lectured sa antas na ito. Wangerin naiiwan sa Berlin hanggang 1882 kung kailan siya ay inalok ng posisyon ng obispo propesor sa University of Halle-Wittenberg.