Änderungen

* 1986 Habilitation at Faculty of Mathematics, Technical University of Berlin     

* 1986 Habilitation at Faculty of Mathematics, Technical University of Berlin     

* 1981 Doctorate at Faculty of Mathematics, University of Bielefeld     

* 1981 Doctorate at Faculty of Mathematics, University of Bielefeld     

* 1965-1969 Studies of Mathematics and Sociology (Diploma in Mathematics and Sociology) in Berlin, student tutor in mathematics     

* 1965 - 1969 Studies of Mathematics and Sociology (Diploma in Mathematics and Sociology) in Berlin, student tutor in mathematics     

* 1963-1965 Studies of Physics, Mathematics, Philosophy in Cologne (Pre-Diploma in Physics and Mathematics), Grant for the Highly Gifted by “Studienstiftung des Deutschen Volkes”, student tutor in mathematics since 1964     

* 1963 - 1965 Studies of Physics, Mathematics, Philosophy in Cologne (Pre-Diploma in Physics and Mathematics), Grant for the Highly Gifted by “Studienstiftung des Deutschen Volkes”, student tutor in mathematics since 1964     

=== Professional ===

=== Professional ===

* 2007 – 2011 Vice-President / Deputy Vice-Chancellor of Freie University, responsible for transformation of study orders into Bachelor and Master Studies according to the Bologna-process, and in particular adaptation of Bachelor and Master orders to state controlled teacher education, responsible for the Faculties of Economics, of Social and Political Studies, of Education and Psychology       

* 2007 – 2011 Vice-President / Deputy Vice-Chancellor of Freie University, responsible for transformation of study orders into Bachelor and Master Studies according to the Bologna-process, and in particular adaptation of Bachelor and Master orders to state controlled teacher education, responsible for the Faculties of Economics, of Social and Political Studies, of Education and Psychology       

* 2002 Invited Guest Professor at Faculty of Education, University of Durban-Westville and Natal-University, South-Africa (January-April)     

* 2002 Invited Guest Professor at Faculty of Education, University of Durban-Westville and Natal-University, South-Africa (January-April)     

* 2002 Invited Guest Professor at Faculty of Education, Monash University, University of Melbourne, and at International Centre for Classroom Research (ICCR) at Melbourne (September - November)     

* 2002 Invited Guest Professor at Faculty of Education, Monash University, University of Melbourne, and at International Centre for Classroom Research (ICCR) at Melbourne (September - November)     

* 1999-2001 Guest Professor and Research Consultant at Faculty of Education, University of Durban-Westville, South Africa (Oct. 1999 – March 2001)     

* 1999 - 2001 Guest Professor and Research Consultant at Faculty of Education, University of Durban-Westville, South Africa (Oct. 1999 – March 2001)     

* 1999 Honorary Doctorate in Sciences, awarded by University of Southampton Great Britain     

* 1999 Honorary Doctorate in Sciences, awarded by University of Southampton Great Britain     

* 1999 A. v. Humboldt-Scholarship Award for Research and Capacity Building in South Africa     

* 1999 A. v. Humboldt-Scholarship Award for Research and Capacity Building in South Africa     

* 1997-1999 Vice-President /Deputy Vice Chancellor of Freie University Berlin Responsible for Studies and Teaching, Teacher Education and for the Faculties of Educational Sciences, Psychology, Cultural Studies and Liberal Arts     

* 1997 - 1999 Vice-President /Deputy Vice Chancellor of Freie University Berlin Responsible for Studies and Teaching, Teacher Education and for the Faculties of Educational Sciences, Psychology, Cultural Studies and Liberal Arts     

* 1995 Invited Guest Professor at Monash University, Melbourne (March to August)     

* 1995 Invited Guest Professor at Monash University, Melbourne (March to August)     

* 1994 Invited Guest Professor at University of Durban-Westville and Natal University, South Africa (January to March)    * 1992 - today University Professor for Mathematics Education, Department of Educational Science and Psychology, Freie University Berlin     

* 1994 Invited Guest Professor at University of Durban-Westville and Natal University, South Africa (January to March)    * 1992 - today University Professor for Mathematics Education, Department of Educational Science and Psychology, Freie University Berlin     

* 1990 Visiting Professor and Expert consultant of the Ministry of Education of Indonesia and Evaluator of GTZ for a Science project       

* 1990 Visiting Professor and Expert consultant of the Ministry of Education of Indonesia and Evaluator of GTZ for a Science project       

* 1981-1992 Scientific Collaborator and Assistant Professor (C2) at Faculty of Mathematics, Technical University of Berlin     

* 1981 - 1992 Scientific Collaborator and Assistant Professor (C2) at Faculty of Mathematics, Technical University of Berlin     

* 1976-1981 Director of EPAS (C1) (Research Project on Mathematics Teacher Education: Connecting the first and second phase of teacher training and developing material support) IDM (Institute for Mathematics Education Research) at University Bielefeld     

* 1976 - 1981 Director of EPAS (C1) (Research Project on Mathematics Teacher Education: Connecting the first and second phase of teacher training and developing material support) IDM (Institute for Mathematics Education Research) at University Bielefeld     

* 1970-1976 Research Fellow and Member of Research Group of S.B. Robinson, Max-Planck-Institute for Human Development and Educational Research, Berlin     

* 1970 - 1976 Research Fellow and Member of Research Group of S.B. Robinson, Max-Planck-Institute for Human Development and Educational Research, Berlin     

* 1969-1970 Scientific Collaborator/ Research Fellow at Institute of Mathematics, University of Bielefeld     

* 1969 - 1970 Scientific Collaborator/ Research Fellow at Institute of Mathematics, University of Bielefeld     

== Veröffentlichungen ==

== Veröffentlichungen ==

* [[PME]]  International Group for Psychology of Mathematics Education) International Committee (Scientific Advisory Board of PME) and ICP of PME Paris (1985-1989);     

* [[PME]]  International Group for Psychology of Mathematics Education) International Committee (Scientific Advisory Board of PME) and ICP of PME Paris (1985-1989);     

* [[TIMSS]]  Third International Mathematics and Science Study) Expert-Consultant of the Video-Project (J. Stigler University of California Los Angeles) and Curriculum-Analysis-Project (B. Schmidt University of Massachusetts) 1993-1995

* [[TIMSS]]  Third International Mathematics and Science Study) Expert-Consultant of the Video-Project (J. Stigler University of California Los Angeles) and Curriculum-Analysis-Project (B. Schmidt University of Massachusetts) 1993-1995