The Study And Implementation Of Instruction Pattern Scheduling In Intelligent Tutoring System

Many intelligent tutoring systems were developed using multi-media, hyper-media and network technologies, and they can share instruction resources. Using these systems, the learners can arrange their own learning plan and speed according to their capabilities and time. However, these systems were developed for specific purposes, and there is only one instruction pattern in the system. The only instruction pattern was fixed in the system and contolled the whole tutoring process. It cannot vary adaptively with the different needs of students and the different instruction contents. So there are limits in these systems.This paper aims at the problem that there is single instruction pattern in tutoring system, and thinks that if a tutoring system has many instruction patterns and can schedule the patterns according to the status of students, the system will be more adaptive. Therefore this paper makes an investigation on the instruction pattern scheduling in intelligent tutoring system with multi instruction patterns (abbr. MIPITS) carefully. The purpose is that it can propose a method of tutoring student with using multi instruction patterns through the study of pattern scheduling. This paper studied the implementation of pattern scheduling, including the definition of instruction pattern, the relations among instruction, student model and instruction resources, the presentation of patterns in MIPITS and the management of instruction pattern such as the addition, deletion and alternation. In order to break the whole control on instruction process of single instruction pattern, this paper proposed the instruction method of "globle instruction plan-instruciton pattern scheduling-local instruction plan in a certain instruction pattern", discoursed a new knowledge model and curricula architecture model, and based on these model this paper designed the instruction plan and realized the pattern scheduling. At the same time this paper studied the software architecture of MIPITS, and proposed a layered model of MIPITS in which it can use agent technology. Moreover this paper solved the problem of cooperation among parts of the system, especially solved theproplem of cooperation between agent part and non-agent part in the complicated system.At last, this paper designed the prototype of MIPITS and developed its experiment system (MIPITS-ES), and used the experiment system to verify the realization method of instruction pattern scheduling including instruction plan, pattern scheduling, construct of MIPITS, cooperation of the system especially the cooperation between agent part and non-agent part in MIPITS. The experiment presents that the implementation of MIPITS and pattern scheduling enable the system to be more apative, at the same time, the flexible architecture and the method of cooperation among different parts in system make the system to be maintained more conveniently.