1. Ball, D. L. (1988). Knowledge and reasoning in mathematical pedagogy: Examining what prospective teachers bring to teacher education. Unpublished Doctoral dissertation, Michigan State University, East Lansing.
2. Ball, D. L. (1991). Research on teaching mathematics: Making subject matter knowledge part of the equation. In: J. Brophy (Ed.), Advances in research on teaching: Teachers’ subject matter knowledge and classroom instruction (Vol. 2, pp. 1–48). Greenwich, CT: JAI Press.
3. Beck, J. A., & Wynn, H. C. (1998). Technology in teacher education: Progress along the continuum. ERIC Document Reproduction No. ED 424 212.
4. Learning to teach hard mathematics: Do novice teachers and their instructors give up too easily?;Borko;Journal for Research in Mathematics Education,1992
5. Cognition and improvisation: Differences in mathematics instruction by expert and novice teachers;Borko;American Educational Research Journal,1989