Over the last decade many countries have experienced a surge in demand for
             English as a foreign language. As developing countries have begun to open to
             the world, the demand for English has soared. Foreign language teaching in
             many developing countries has played an important role in education, as well
             as in the development of the country. In particular, English has been in the
             leading position with the highest number of students in Vietnam. Together
             with the development of language, language teaching methodology has also
             developed a lot to ensure the effectiveness of teaching and learning. This
             development is in fact the import of modern foreign language teaching
             approach used in developed contexts, usually called communicative language
             teaching (CLT). Using the implementation of CLT in the Vietnamese context is
             really necessary but the effectiveness also must be taken into account. The
             essay argues that the implementation of CLT in the Vietnamese context faces
             challenges and constraints. The reasons for consideration lie not only in the
             approach but also in teaching context, learning and teaching style, teacherstudent
             relationship, technology and facilities, examinations and curriculum,
             Firstly, it is difficult to admit that communicative language teaching (CLT) is a
             universal approach. According to Holliday (1994), the communicative
             approach is culture-sensitive in itself and it can be modified to suit any
             classroom cultural context. To obtain an appropriate methodology, one needs
             to know about the culture of the classroom which is affected by the culture
             MUELBP Workbook Assessment 6 Research Essay v.1.0 18
             outside in society. As Holliday points out, learning in the classroom needs to
             be worked out from the real context of teaching and learning. He argues that
             one should appreciate the nature of development of this approach. Some
             people claim that communicative method is unworkable ...