Youzou Miyadera Kunimi Kurasawa Shoichi Nakamura Nobuyoshi Yonezawa Setsuo Yokoyama A Program Animation System for Real-time Monitoring of Learning. 71-75 2006 conf/icalt/2006 ICALT http://doi.ieeecomputersociety.org/10.1109/ICALT.2006.28 db/conf/icalt/icalt2006.html#MiyaderaKNYY06