Änderungen

* Michele Artigue, University of Paris-Diderot, France

* Michele Artigue, University of Paris-Diderot, France

* Ferdinando Arzarello, University of Torino, Italy

* Ferdinando Arzarello, University of Torino, Italy

* [[Barbel Barzel]], University of Education, Freiburg, Germany

* [[Bärbel Barzel]], University of Education, Freiburg, Germany

* Marcelo Borba, Sao Paulo State University, Rio Claro, Brasil

* Marcelo Borba, Sao Paulo State University, Rio Claro, Brasil

* Alison Clark-Wilson, London Knowledge lab, University of London, UK

* Alison Clark-Wilson, London Knowledge lab, University of London, UK

* Luc Trouche, Institut National de Recherche Pèdagogique, Lyon, France

* Luc Trouche, Institut National de Recherche Pèdagogique, Lyon, France

* [[Hans-Georg Weigand]], [[Universität Würzburg]], Germany

* [[Hans-Georg Weigand]], [[Universität Würzburg]], Germany

== Hauptvorträge ==

== Hauptvorträge ==