The Intelligent Computer Tutoring Group was established in 1998 for research in the area of Artificial Intelligence in Education. The focus of the group is on Student Modeling. We have implemented several constraint-based ITSs, which have been thoroughly evaluated. We are currently developing ASPIRE, an authoring system for developing constraint-based ITSs. Some of other current projects in the group concentrate on supporting meta-cognitive skills and collaborative learning in our tutors.