Judithe Sheard Julianne Lynch Challenges of Web-Based Learning Environments: Are We Student-Centred Enuf? 1-11 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2783&spage=1 2003 conf/icwl/2003 ICWL db/conf/icwl/icwl2003.html#SheardL03