Significance of The Study

towards their native language, the more frequent they switch FL to NL. This will cause the students less progressive in learning English. However, the target language input uttered by the teachers play an important role in foreign language learning. 5. Clarify students’ understanding after switching FL to NL or vice versa because if code switching occurs in inappropriate context or content, it will create fuzziness for the students. REFERENCES Aichun, L. 2003. Teacher Code-switching in EFL classroom. Beijing: Beijing University Press, Ltd. Azwani, M. 2012. Code-switching in teaching English to Grade Eleven Students. Unpublished Post Graduate Thesis, State University of Medan. Beardsmore, H. 1982. Bilingualism: Basic Principles. Vrije Universiteit Brussel. Tieto, Ltd. Bogdan, R. Biklen, S. 1992. Qualitative Research for Education. United State of America. Bower, R. 1980. Verbal Behavior in The Language Teaching Classroom. Working Papers. Costa, A. 2004. Lexical Acsess in Bilingual Speech Production: Evidence from Language Switching in Highly Proficient Bilinguals L2 Learners. Journal of Memory and Language, 50, 491-511. Fabro, F. 2001. The Bilingual Brain: Bilingual Aphasia. Brain and Language Journal, 79, 201-210. Fishman, JA. 1965. Who Speaks that Language to Whom and When?. La Linguistique, 2, 67-88. Graves, P. 1994. Writing as a Process. New Jersey: Lawrence Erlbaum Associates Publishers. Grim, 2010. L1 in L2 Classroom at The Secondary and College Levels: A Comparison of Functions and Use by Teachers. Electronic Journal of Foreign Language Teaching. Vol 7, 193-209. Grosjean, F. 1982. The Bilingual’s Language Mode: One Mind, Two Languages. Malden MA. Blackwell Publishers Inc. Harmer, J. 2001. The Practice of English Language Teaching. Cambridge: Longman. Higgs, T. 1982. Introduction: what can I do to help Curriculum, Competence, and The Foreign Language Teachers. National Texbook Company. Hoffman, A. 1991. Code-switching as a Worldwide Phenomenon. New York: Peter lang. Jinxia, L. 2010. Teacher’s Code-switching to L1 in EFL Classroom. The Open Applied Linguistic Journal, Vol 3, 10-23.