The completion of this study would not have been possible without the assistance of special and wonderful people.
First of all, I would like to acknowledge my indebtedness and gratitude to Mr. Le Van Canh, for his unfailing encouragement, constant support and supervision during all stages of the study. His enthusiastic assistance, guidance, support, and his wisdom greatly contributed to the fulfillment of my thesis. I would also like to thank my supervisor for his patience in reading and editing my draft. It must be an excruciating experience.
I am also indebted to Dr. Nguyen Hoa, Dr. Le Hung Tien, Dr. Hoang Van Van, Dr. Vo Dai Quang, Dr. Nguyen Quang, Dr. Nguyen Thi Thuy Minh, Dr. Roger Barnard and all the professors for their encouragement and wonderful lectures while I was taking the M.A course in language methodology at College of Foreign Languages Vietnam National University (VNU). Their constructive ideas, assistance and advice helped me much during various stages of learning and my M.A study.
Many thanks to Dr. Roger Barnard who gave me significant materials and valuable suggestions during the process of my writing literature reviews.
My heartfelt gratitude is also to the four English teachers and students of Hadong upper secondary school for their tremendous supports in the collection of data and information for my study.
My appreciation also goes to my loving parents, my uncle Dr. Nguyen Huu Tho, my husband and my two little sons whose unconditional love, understanding, encouragement, and support are invaluable during my whole study.