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1 Leinhardt, G., "Where subject knowledge matters. in: Advances in research on teaching: Vol. 2. Teachers' knowledge of subject matter as it relates to their teaching practice" JAI 87-114, 1991
2 Shulman, L. S., "Those who understand: Knowledge growth in teaching" 15 (15): 4-14, 1986
3 Lodholz, R. D., "The transition from arithmetic to algebra. in: Algebra for everyone" National Council of Teachers of Mathematics 24-33, 1990
4 Brown, M. W., "The teacher-tool relationship: Theorizing the design and use of curriculum materials. in: Mathematics teachers at work: Connecting curriculum materials and classroom instruc- tion" Routledge 17-36, 2009
5 Kahan, J. A., "The role of mathematics teachers' content knowledge in their teaching: A framework for research applied to a study of student teachers" 6 : 223-252, 2003
6 An, S., "The pedagogical content knowledge of middle school, mathe- matics teachers in China and the U. S" 7 : 145-172, 2004
7 Glaser, B. G., "The discovery of grounded theory: Strategies for qualitative research" Adline de Gruyter 1967
8 Fernandez, E., "The "Standards-like" role of teachers' mathematical knowledge in responding to unanticipated student obser- vations" 1997
9 Grossman, P. L., "Teachers' knowledge. in: International encyclop- edia of teaching and teacher education" Elsevier 20-24, 1995
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