5Perkins, D.N. (1991). Technology Meets Constructivism: Do they make a marriage? Educational Technology, 31 (5): 18-23.
6Geoffrion, L, & Goldenberg, E. (1981). Computer-based Exploratory Learning Systems for Communication-handicapped Chil dren. Journal of Special Education, 15 (3): 25-32.
7Jonassen, D. (1996). Computer in Classroom: Mindtools for Critical Thinking. Englewood Cliffs, NJ: Prentice-Hall, Inc. D. Krashen,Steven.(19$6).The Input Hypothesis: Issues and Implications. Longman Group Limited.1986.
8Stem,H.H.(1996). Issues and Options in Language Teaching. Oxford University Press, Walton Street, Oxford OX2 6DP.
9Education Commission of the States (ECS): In pursuit of quality teaching: five key strategies for policymakers, denver, ECS, 2000
10Zhongyi Yuan:An analysis of the ongoing professional development needs of principals identified in the initial year of a longitudinal study. December 1998