It has been recognized that international business are continuously growing in Thailand. The numbers of production plant and company invested by the foreigners have been increased these recent years. It creates greater demands for the workforce to develop high-leveled English language skills for business communication. Such demand can be seen in business organizations requiring their employees to have highly functional language skills to be able to perform their business efficiently. Many jobs require the applicants to be fluent in English. Knowledge of English as a second language is a requirement for this decade.