Design Science and Its Importance in the German Mathematics Educational Discussion - Nührenbörger, Marcus; Rösken-Winter, Bettina; Fung, Chun Ip; Schwarzkopf, Ralph; Wittmann, Erich Christian; Akinwunmi, Kathrin; Lensing, Felix; Schacht, Florian (Springer International Publishing : Imprint: Springer, 2016)