Early childhood education is much more important in our society. It is difficult to pick a good school because now parents have more choices, especially because there are schools all over Taiwan. In past research, we cannot find a direct method that helped parents choose quality school. Hence, the main purpose of this study is to analyze the influence factor for kindergarten, and give suggestions for parents on the more effective way to pick a quality school. In this paper, we use the grey relational grade in grey system theory and significant in rough set theory as the mathematics models. Through the practical analysis in Taichung area, this study reveals that the most important factor is the ratio of students to teachers; it is quite matching with the real thinking of parents, and then parents could take the study result for the reference as making choices in kindergarten.
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