Kim, Young - ran This study compares the result of 2011 NAEA Korean test between 6 graders’ cohort and students with multicultural background. It also analyses the result of the Advanced students within the groups. In this study, students with multicultural background are divided into 3 groups. First one is a group of students are born in Korea and either of parents is non-Korean. Second one is a group of students are born & brought up abroad and either of parents is non-Korean. The last one is a group of students with both parents being non-Korean. NAEA stands for National Assessment of Educational Achievement and it’s Korean test was a census test for 6 graders in elementary school in 2011. According to the result of NAEA tests, students are grouped into 4 levels such as Advanced, Proficient, Basic, Below Basic. The Advanced group represents highest level of educational achievement. The result of analysis shows that generally multicultural students’ correct answer rates to each item of the test were lower than the cohort and especially they had more to improve in reading, writing, grammar, and literature than listening. However, the Advanced group in multicultural students generally showed similar level of correct answer rate to the cohort. k e y w o rd s National Assessment of Educational Achievement ( NAEA ), Educational achievement, multicultural students, item response, The Advanced 151