ATS is a WWW-based tutoring framework, which combines methods of knowledge representation, instructional planning and adaptive media generation to deliver individualized courseware over the WWW.
In the domain expert model, the concepts of the domain, their interrelations and dependencies are described.
The pedagogical expert model contains pedagogical strategies and diagnostic knowledge.
The learner model stores the preferred settings of a learner, the domain concepts a learner worked on, and used interface components.