Coach: A Schema-Based Tutor.

The Coach system, a computer simulation of a human tutor, was constructed with the goal of obtaining a better understanding about how a tutor interprets the student's behavior, diagnoses difficulties, and gives advice to a student learning a simple computer programming language. Coach is based on a hierarchy of active schemas representing the tutor's general concepts, more specific information represented in a semantic network, and the coordination of data-driven and conceptually-guided processing which enable it to interpret behavior, recognize errors, and give advice. (Author)