| 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 |
| seit 3/2009 | Professor of Mathematics Education at the University of Paderborn, Faculty of Electrical Engineering, computer science and mathematics |
| seit 2010 | Managing Director of the Centre for Higher Mathematics Education (khdm) of the Universities of Kassel, Lüneburg and Paderborn |
| seit 2011 | Member of the board of the German Center for Teacher Education Mathematics (DZLM); Head of secondary education |
