@inbook {886, title = {Wer unterrichtet unsere Kinder? SUN {\textendash} Sachunterricht in Nordrhein-Westfalen}, booktitle = {Qualit{\"a}t von Grundschulunterricht entwickeln, erfassen und bewerten}, volume = {11, Jahrbuch Grundschulforschung}, year = {2007}, pages = {171-174}, publisher = {Verlag f{\"u}r Sozialwissenschaften}, organization = {Verlag f{\"u}r Sozialwissenschaften}, address = {Bonn}, author = {Peschel, Markus and Struzyna, Sarah}, editor = {m{\"o}ller, Kornelia and Hanke, Petra and Beinbrech, Christina and Hein, Anna and Kleickmann, Thilo and Schages, Ruth} }