Änderungen

=== Tagungsbeiträge mit Reviewverfahren ===

=== Tagungsbeiträge mit Reviewverfahren ===

* 2011 (mit [[Andreas Eichler]]): „Secondary Teachers’ Beliefs on Modelling in Geometry and Stochastics“ in Proceedings of ICTMA 14.

* 2011, mit [[Andreas Eichler]]: „Secondary Teachers’ Beliefs on Modelling in Geometry and Stochastics“ in Proceedings of ICTMA 14.

* 2011: „Geometry as Propaedeutic to Model Building – A Reflection on Secondary School Teachers' Beliefs“ in Proceedings of CERME 7.  

* 2011: „Geometry as Propaedeutic to Model Building – A Reflection on Secondary School Teachers' Beliefs“ in Proceedings of CERME 7.  

* 2009: „Ontological Beliefs and Their Impact on Teaching Elementary Geometry“ in Proceedings of PME 33.

* 2009: „Ontological Beliefs and Their Impact on Teaching Elementary Geometry“ in Proceedings of PME 33.