This study explores the way in which Korean parents involve in the development of their children's English language while they stay in the U.S. to improve the children's English abilities. 10 parents participated in this study through free discussion, E-interview, E-journal, and in-depth interview. The research finds that the parents play three roles involved with their children's English language development. First, the parents, as helpers, participate in their children's English study in direct or indirect ways. Second, they, as mediators, help their children build the relationship with their peers and teachers. Lastly, they place an emphasis not only on second language learning, but on their mother tongue to preserve their children's identities and to help their children continue to study in their own country, Korea. When they are ready to return to Korea, the parents are concerned about their children's continuous practice in English. The results of the study will offer pedagogical implications to parents who have children planning to study abroad and teachers to instruct students who finish studying abroad.