The significance of role of code switching and code mixing in classrooms where medium of instruction is second/foreign language is approved reality. Observations of bilingual/multilingual classrooms show that teachers use code switching and code mixing in different situations for different purposes. This study aims at knowing the functions of CS (code switching) and CM (code mixing), use teachers in classrooms and the significance of the functions. The data for this study would be collected from teachers, teaching at intermediate level, of government and private colleges, using survey technique. The data would be analyzed statistically using SPSS software. The finding of this study would develop awareness about the use of CS and CM in bilingual classrooms. This study is significant as it would create flexibility in teaching methodologies of teachers. Keywords: Code, Code switching, code mixing, SL, F
