Abstract
This research aims to clarify the purpose of incumbent teachers' use of the "Rika network". First, a factor analysis was performed for the questions of which the standards concerning the "Rika network" use were composed. The factor analysis produced four factors. The first is "Clarification and fixed of content of study". The second is "Specification of learning task and extending the perspective of observation". The third is "Support of experimental observation and manufacturing technology". The fourth factor is "examines study of learners". These four viewpoints reflect the intention and motive for differentiating among the school kind, the class place, and the class form. Subsequently, a factor decentralized analysis was done by using the mean value of the obtained factors to examine a target difference by the number used. The result showed that there is a difference in the purpose depending on the number used in the 1st, 2nd, and the 3rd factors. The difference appeared mainly when "Once" or "5-6th times" were used.
