Fabio N. Akhras Benedict du Boulay Arthur C. Graesser Susanne P. Lajoie Rosemary Luckin Natalie K. Person Workshop on Modeling Human Teaching Tactics and Strategies. 908 http://dx.doi.org/10.1007/978-3-540-30139-4_120 2004 conf/its/2004 Intelligent Tutoring Systems db/conf/its/its2004.html#AkhrasBGLLP04