The purpose of this study is to find out ways to improve the effectiveness of English Medium
Instruction(EMI) in the university in Korea, based on the questionnaires of college students' needs. For this,
we analysed the results of a total of 103 students taking the EMI class, in different groups, depending on
their levels of English competence. In the questionnaire, 15 subjects, including the administrative support
at the college, instructors' teaching methods, and instructors' English competence are evaluated as potential
areas of improvement. Additionally, students are asked to indicate the present levels and expected levels for
each of 15 subject matters. We used the t-test and Borich-value as difference tests between two levels.
The results of this analysis are as follows: First, most students take EMI to improve their English
proficiency rather than its subject or major-related content. Second, the higher the English level the
students are at, the more they are aware of the effectiveness of EMI and satisfied with the class. Third,
the students liked the different teaching methods depending on their levels of English proficiency. Specially,
the students in the ‘low’ levels tend to demand bilingual language use in class, having difficulties in
taking ‘English-only’ classes. In conclusion, to enhance the efficiency and the effectiveness of EMI,
differentiated classes depending on the students' level of English proficiency are required.