Jungsoon P. Yoo Chrisila C. Pettey Sung K. Yoo Judy Hankins Cen Li Suk Jai Seo Intelligent tutoring system for CS-I and II laboratory. 146-151 2006 conf/ACMse/2006 ACM Southeast Regional Conference http://doi.acm.org/10.1145/1185448.1185482 db/conf/ACMse/ACMse2006.html#YooPYHLS06