Authoring Step-Based ITS with ASTUS: An Interactive Event

Step-based ITS have been proven successful for well-defined domains, particularly in well-defined tasks, but their success is mitigated by the amount of effort needed to build them. Typically, the main factor behind these efforts is the model of the task domain. Different approaches have been investigated to reduce these efforts: Model-Tracing Tutors (e.g. Cognitive Tutors, Andes), Constraint-Based Tutors (e.g. SQL-Tutor, ASPIRE) and Example-Tracing Tutors (e.g. CTAT’s, ASSISTment).