What is Code Switching

This chapter examines the effectiveness of second and foreign language learners using their L1 within their zone of proximal development to improve their L2 acquisition, and explores the usefulness of assessing specific L1 language skills to provide a more accurate analysis of learner acquirement. This theoretical approach will be examined in light of Lev S. Vygotsky and Vivian Cook's concepts of using the L1 in teaching and assessing the L2. One of these methods is the “new concurrent method” which identifies “code-switching” as a one of its important elements in creating real life situations in the classroom. In addition to theory, this chapter provides practical ESL/EFL assessments and trends of their application. By briefly exploring some of the justifications behind banning the L1 in ESL/EFL classrooms, the chapter criticizes and refutes the pedagogical claims and assumptions made throughout the reform movement which have affected many generations of students and influenced teacher training and instruction for a number of years.