The superior performance of East Asian students in recent international
studies of mathematics achievement has attracted the attention of
educators and policy makers worldwide. Xinrong Yang focuses on exploring
how an expert mathematics teacher is conceptualized by mathematics
educators in China and the characteristics that expert mathematics
teachers share. The author adopts a sociocultural theory and a
prototypical view of conception in this study of teacher expertise and
shows that some of the roles expected to be played by expert mathematics
teachers in China, such as being at the same time a researcher, a
mentor, an expert in examination, and an exemplary model, are quite
different from the roles expected of an expert teacher in Western
cultures. In addition, some characteristics of expert mathematics
teachers the author identifies are different from those reported in
previous studies. Examples include the expert mathematics teachers´
contemporary-constructivist oriented beliefs about mathematics and its
learning and teaching, and their ability to teach with flexibility,
balance, and coherence.