@inbook {877, title = {Der Begriff der Offenheit beim Offenen Experimentieren}, booktitle = {Chemie- und Physikdidaktik f{\"u}r die Lehramtsausbildung}, year = {2009}, pages = {268-270}, publisher = {LIT Verlag}, organization = {LIT Verlag}, address = {M{\"u}nster}, author = {Peschel, Markus}, editor = {H{\"o}ttecke, Dietmar} }