6Stephen C.Ehrmann . Emerging Models of Online Collaborative learning[J] . journal of AECT, 2001, (1)
7Dowling,C . Social interaction and the construction of knowledge in computer-mediated environment[A] . In: D.M Watson & T.Downes(Eds.) . Communications and networking in education: Learning in a networked society[C] . Boston: Kluwer Academic Publishers,2000 . 165-173
9Margulies,A.H.(2003).MIT OpenCourseWare University of California System[DB/OL].http://ets.berkeley.edu/etstandards/ocw/mit ocw-2003-03-04.ppt,Slide:32.
