Agustinus Semiun Pengarang

Abstract It is usual for non-native EFL teachers to use code switching and or code mixing as a medium of instruction due to a number of factors such as inadequate oral ability of the teachers, complexity level of teaching topics, curriculum and poor basic English of the students. However it is unusual if the teachers of great oral ability maximize if not always use code switching for most of the time during instruction. This article tries to explain the code switching and or code mixing performed by the EFL teachers in senior high schools spreading over the West Timor land, the province of Nusa Tenggara Timur and the factor of " individual preferences " as their reason why teachers of great oral ability favor to use code switching and or code mixing during classroom instruction like those of lower or inadequate oral ability of English. The data recorded and presented in this article prove that the teachers use code switching in four types that might be similar or different from those in other places in Indonesia. Key Words: Individual preferences, EFL teachers, code switching medium of instruction