Elliot Soloway Cathleen A. Norris Having a Genuine Impact on Teaching and Learning - Today and Tomorrow. 903 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3220&spage=903 2004 conf/its/2004 Intelligent Tutoring Systems db/conf/its/its2004.html#SolowayN04