Information Technology (IT) is a major force that has brought about revolutionary changes in the development of the global, digital society. Education is considered the foundation for development and the concept of IT use in education as powerful tools is strongly encouraged in Vietnam.
The powerful tools which can help teachers to expand the four walls of the traditional classroom and rebuild the class without the walls are increasing in both quantity and quality with the advent of the technology era in the country. Regarding Second Language Teaching, IT has been considered as a tremendous potential tool. IT tools are various from using some popular software in teaching like Power point, Word Processor, Window media to others which are more complex like using Internet, WWW, Webquest, Weblog to improve the language skills.
Many articles have discussed the effectiveness of IT tools in SLT in the world. However, the application of IT tools in ESL in Vietnam was set forth by Nguyen Lan Trung and Ngo Van Nghiem (1997) who suggested the use of CD-ROM. The recent focus on technology in language study has been on the use of Power point, email and Internet (Nguyen Thu Hoai, 2005; Nguyen Thi Lan Huong, 2004; Pham Thi Ngoc Phuong,2006). The latest focused on the Webquest and Weblog effectiveness in ESP course. In spite of the claimed advantages of these researches, there is a limited number of studies on the developing the Vocabulary Acquisition in ESP course.