5Grigutsch, S. 1998. On pupils' views of mathematics and self- concept : developments, structures and factors of influence [ A ]. InE. Pehkonen & G. T? rner (Eds.) The state-of-art in mathematics - related belief research. Results of the MAVI activi- ties [ C ]. Research report 195, Department of Teacher Educa- tion, University of Helsinki, 1998. pp. 169-197.
6Wenger, E. Communities of Practice: Learning, Meaning and Iden- tity [ M ]. Cambridge : Cambridge University Press, 1998.
7Editorial. Teaching Teachers Studies into the Expertise of Teacher Educators:all Introduction to this Theme Issue [ J ]. Teaching and Teacher Education, 2005 (21) :107 - 115.
8Manski, C. F. Academic ability, earnings, and the decision to become a teacher I: Evidence from the national longitudinal study of the high school class of 1972 [ A]. In D. Wise ( Ed. ) Public sector payrolls [ C ]. Chicago: Chicago University Press, 1987:291 - 312.
