We present an inference algorithm for perturbation models based on Poisson regression. The algorithm is designed to handle unclassified input with multiple errors described by independent mal-rules. This knowledge representation provides an intelligent tutoring system with local and global information about a student, such as error classification…

MEDIT, a World Wide Web-based environment, aims at offering complementary support to traditional educational practices. The MEDIT approach distinguishes a set of virtual working spaces and provides the appropriate services for each of them. In addition to a generic hypermedia authoring system, designers implemented advanced tools for multiple view…