Jihie Kim Erin Shaw Sujith Ravi Erin Tavano Aniwat Arromratana Pankaj Sarda Scaffolding On-Line Discussions with Past Discussions: An Analysis and Pilot Study of PedaBot. 343-352 2008 Intelligent Tutoring Systems http://dx.doi.org/10.1007/978-3-540-69132-7_38 conf/its/2008 db/conf/its/its2008.html#KimSRTAS08