讲座嘉宾：Claudia Bttinger博士（University of Duisburg - Essen ）
Claudia Bttinger 博士简介：
1981-1986 studies in mathematics at the university of Essen；
1990 PHD in mathematics awarded with the Baedeker price；
1990-1994 postdoc in the working group of Prof. Gbel；
1988-2000 teaching activities at Mannesmann and RWE/Eon；
1999-2007 employments in various working groups in didactics of mathematics；
Since October 2007 lecturerer at the university of Duisburg - Essen first in didactics of mathematics, now in mathematics (e. g. mathematics for engineers).