2Richard W. Riley, E - Learning: putting a World - Claas Education at the Fingertip, M All Children(The National Educational Technology Pain), Dec. 2000 U, S. Department of Education,Office of Educational Technology.
3www.ceoforun.org.
4Edited by Virginia Richardson.Constructivist Teacher Education.The Falmer Press.1997.
5Harris,J. B.Organizing and facilitating telecollaborative projects[].The Computing Teacher.1995
