Änderungen

*2004 - 2010 University Professor for Mathematics Education, Department of Educational Science, [[Universität Hamburg]]

*2004 - 2010 University Professor for Mathematics Education, Department of Educational Science, [[Universität Hamburg]]

*2004 Invited Guest Professor at Department of Mathematics, Johann Wolfgang [[Universität Frankfurt|Goethe-Universität Frankfurt]]

*2004 Invited Guest Professor at Department of Mathematics, Johann Wolfgang [[Universität Frankfurt|Goethe-Universität Frankfurt]]

*2002 Habilitation at Department of Educational Science and Psychology, [[Freie Universität Berlin]]

*2002 [[Innovation des Alltags - der Alltag der Innovation - Rekonstruktionen alltäglicher Innovationsprozesse am Fall des Mathematikunterrichts der Grundschule|Habilitation]] at Department of Educational Science and Psychology, [[Freie Universität Berlin]]  

*2001 - 2002Guest Professor at Department of Educational Science, Universidad Metropolitana de Ciencias de la Educación, Santiago de Chile

*2001 - 2002Guest Professor at Department of Educational Science, Universidad Metropolitana de Ciencias de la Educación, Santiago de Chile

*2001 Feodor-Lynen-Scholarship for Research in Chile by Alexander-von-Humboldt-Foundation

*2001 Feodor-Lynen-Scholarship for Research in Chile by Alexander-von-Humboldt-Foundation