Design and Management of Material Sharing System for Ubiquitous Vocabulary Learning

In our project, we are developing a system that helps learners in vocabulary acquirement. In the system, learners can create their own materials for mobile learning, and they can also exchange their materials. This paper focuses on a sub system, SIGMA, to share and exchange materials among learners. In addition, SIGMA enables learners to give evaluation scores and comments to all learning materials stored in the system. In this paper, we will discuss the management policy of the system based on the reliability of the evaluation scores given by the learners to select appropriate materials. From the result of our experiment, we concluded that the evaluation scores have some reliability but an instructor should guide the learners.