This study was conducted for 16 weeks in the next three stages to find ways to improve Korean language skills for For Vietnamese middle school student who entered Korea using various traditional fairy tales. As a result of reviewing the prior study, the first stage selected traditional fairy tales that learners were interested in. In the second phase, 10 traditional fairy tales were composed as supplementary materials and used for Korean language classes. As a way to produce the results of the study, the changes of learners in the class are written in the teacher's observation log. After the class, the learning effectiveness of the four areas of Korean was verified in various angles by observing the changes of learners with a survey and a Korean language proficiency diagnosis-calibration system. In conclusion, the study not only improved Korean language skills through various traditional fairy tales for middle school students who entered Korean schools, but also showed that customized Korean language education for each target is possible in general schools. (Namchang middle school)