5Jarvis, Peter, Professional Education, London: Croom Helm, 1983, P. 1.
6Lee S. Shulman, ‘Foreword’, in Julie Gess-Newsome and Norman G. Lederman, eds., Examining Pedagogical Content Knowledge, Boston: Kluwer Academic Publishers,1999, p.x.
7Shulman, L. S. (1986), ‘Those who understand: knowledge growth in teaching, ‘Educational Researcher, 15(2)4-14.
8Grossman, P.L. (1990). The making of a teacher: Teacher knowledge and teacher education. New York: Teachers College Press, p.5.
