To present suitable questions to students taking the courses and have them answer the questions in a remote instruction system using the Internet, so as not to bore them.

Since instructor side can present problems by combination of several patterns of problems, they can easily be uploaded to an Internet site. Moreover, the system is arranged so that a student side can participate in the problems in relaxation. Since the student is encouraged and praised in various ways while the attendant is being involved in the questions, he is motivated and will have incentive for rank up himself. Moreover, since the attendant is required to correctly answer the same pattern of question two times continuously to be ranked up, the attendant will develop his ability without knowing it.