1Shulman,L. S.,& Sykes,G.(1986). A national board for teaching?In search of a bold standard. Paper presented at the Task Force on Teaching as a Profession,Carnegie Forum on Education and the Economy,Standford,CA,
2Shulman,L. S.(1987). Knowledge and teaching: Foundations of the new reform. Harvard Educational Review,57( 1 ), 1-22.
3Cochran,K.F.DeRuiter,J.A.,& King R.A.(1993).Pedagogical content knowing: an integrative model for teacher preparation. Journal of Teacher Education, 44(4), 263-272.
4Tobin, K., Tippins, D.J., & Gallard,A.J. (1994). Research on Instructional Strategies for Teaching Science. In Gabel, D. (Ed.), Handbook of Research on Science Teaching and Learning (pp 45-93).New York:Wacmillan Publishing company.
5Ledeman,N.G.&Latz,M, (1993).Emergence and Interactions of knowledge structures in the preservice teacher. Paper resented at the Annual meeting of the National association for Research in Science Teaching. Atlanta,Georgia.
6Kennedy,M.M (1990).A survey on recent literature of teachers,subject-matter knowledge. Issue paper 90-3.NCTRE,Michigan State Universily, East Lansing,Michigan.
7Marks,R.(1990).Pedagogical content knowledge:From a mathematical case to a modified conception. Journal of teacer Education,41(3),3-11.