Das Zahlenbuch. Schülerbuch 3. Schuljahr. Allgemeine Ausgabe ab 2017Erich C. Wittmann, Gerhard N. Müller, Marcus Nührenbörger, Ralph Schwarzkopf, Melanie Bischoff, Daniela Götze, Birgit Heß · First published 2018Open the Tome
Design Science and Its Importance in the German Mathematics Educational DiscussionMarcus Nührenbörger, Bettina Rösken-Winter, Chun Ip Fung, Ralph Schwarzkopf, Erich Christian Wittmann, Kathrin Akinwunmi, Felix Lensing, Florian Schacht · First published 2016Open the Tome
