3Coppola, N. W., Hiltz, S. R., & Rotter, N.. Becoming a virtual professor: Pedagogical roles and asynchronous learning networks[ J]. Journal of Management Information Systems, 2002,8 (4) :169 -189.
4Anderson, T, Rourke, L. , Garrison, D. R. , & Archer, W.. Assessing teaching presence in a computer conferencing context[J]. Journal of Asynchronous Learning Networks, 2001,5(2) : 1 - 17.
5Visser, J. A.. Faculty work in developing and teaching Web -based distance courses: A case study of time and effort[ J]. The American Journal of Distance Education, 2000,14 (3) :21 - 32.
6Bolliger D. U. ,Wasilik, O.. Factors influencing faculty satisfaction with online teaching and learning in higher education [ J ]. Distance Education ,2009,30 ( 1 ) : 103 - 116.
