@inbook {Kor-EAVA-2011, title = {Die etwas andere Vorlesung: AnOrMaL}, booktitle = {Mathematik f{\"u}r alle - Wege zum {\"O}ffnen von Mathematik. Mathematikdidaktische Ans{\"a}tze. Festschrift f{\"u}r Wilfried Herget}, year = {2011}, publisher = {Franzbecker}, organization = {Franzbecker}, address = {Hildesheim}, keywords = {invited}, author = {Kortenkamp, Ulrich}, editor = {Krohn, Thomas and Malitte, Eva and Richter, Gerd and Richter, Karin and Sch{\"o}neburg, Silvia and Sommer, Rolf} }