| Education and Studies |
| 1953 | Born in Detmold (Lippe) |
| 1971 | Graduated from Leopoldinum II, Detmold |
| 1971-1977 | Studied Mathematics and Physics at University of Marburg and Bonn University (Teaching and Diploma) - funded by the Studienstiftung des deutschen Volkes |
| 1977 | Degree in Mathematics from the University of Marburg. Thesis: Measurements on product spaces with given marginal distributions and predetermined discrete cumulative distribution |
| 1977-1979 | Postgraduate studies in mathematics education at the Department of Mathematics Education (IDM) at Bielefeld University - Scholarship of the Volkswagen Foundation |
| University Experience |
| 1979-1982 | Doctoral Candidate, IDM, University of Bielefeld |
| 1982 | PhD in Mathematics Education at the Faculty of Mathematics, University of Bielefeld. Research on exploratory data analysis - A study from the perspective of a descriptive-empirical science theory |
| 1983-1993 | Researcher at IDM, University of Bielefeld, workgroup F3 mathematics teaching in secondary 2. Working focus: didactics and epistemology of Stochastics; application-oriented mathematics teaching; Design, evaluation and use of software for the teaching and learning of mathematics |
| 1993-1999 | Researcher at IDM, University of Bielefeld, Workgroup: mathematics teaching in classes 8-13. Other areas of focus: general secondary mathematics education, teacher training, research development for teaching mathematics |
| 1996-1997 | Acting Professor of Mathematics Education at the University of Paderborn, Department of Mathematics/computer science |
| 1998 | Postdoctoral in Mathematics Education at the Faculty of Mathematics, University of Bielefeld. Research on computer tools as a means of integration of learning and applying of Stochastics - teaching designs and analyzes |
| 1999-2009 | Professor of Mathematics Education at the University of Kassel, Department of Mathematics/computer science |
| since 03/2009 | Professor of Mathematics Education at the University of Paderborn, Faculty of Electrical Engineering, computer science and mathematics |
| 2010-2020 | Managing Director of the Centre for Higher Mathematics Education (khdm) of the Universities of Kassel, Lüneburg and Paderborn |
| 2011-2020 | Member of the board of the German Center for Teacher Education Mathematics (DZLM) |
| since 10/2020 | Officially retired; Projects in Mathematics Education, Data Science Education and teacher training research, Member of the board of the Centre for Higher Mathematics Education (khdm), Head of the secondary school department and member of the extended board of the DZLM |
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