Yang Tae-sun. 2012. University Students' Perceptions about NESPs and NNESPs in EMCs. The Sociolinguistic Journal of Korea 20(2). pp. 291-312. The purpose of this study was to investigate Korean university students' perceptions about NESPs (Native English Speaking Professor) and NNESPs (Non-native English Speaking Professor) in EMCs (English Medium Course) to suggest better ways to implement EMCs in university settings. 100 university students who had an experience in taking EMCs with both NESPs and NNESPs answered the questionnaire and 30 students out of them were also interviewed to consolidate the data. Students expressed that they could benefit from NESPs in the area of language. On the other hand, they thought that they could have more chances to broaden content knowledge with the help of NNESPs. Based on the results of the study, the following suggestions were made for NESPs and NNESPs to implement EMCs in a successful way: NESPs should deepen their knowledge of content areas. NNESPs should use a monitoring service at the university to get comments on their teaching, participate in one-on-one tutoring sessions to practice English with NESPs, participate in meetings to get effective teaching tips from experts, and the university should regularly conduct needs surveys and do ongoing analyses of students' and professors' needs to provide more customized EMCs.