This research has tried to look into effective strategies which foreign students with academic purposes may use, while studying their major subjects. While studying main subjects, these students feel big difficulties in getting knowledge on the subjects and in improving Korean language abilities. This paper proposes team-based learning to get rid of the difficulties and, at the same time, to improve Korean language competence of the students. Team-based learning can be expected to yield the following results. First, foreign students, with the help of cooperative learning with Korean students, can get knowledge on the subjects and improve Korean language abilities. Second, professors of the main subjects may apply classroom strategies which can improve knowledge on the subjects and, at the same time, Korean language competence. Third, foreign students may improve abilities to develop self-directed learning and implement it. Fourth, active activities can be applied to provoke competition and cooperation among individuals and teams. Fifth, foreign students can learn ways of debates and expressions for debating and, with firm confidence, take part in the classes. Sixth, team-based learning can improve familiarity and friendship among the team members. Seventh, foreign students can learn various socio-cultural lexicon and expressions which they may not learn in the major subjects. Eighth, objective assesment on studying can be fulfilled in various way. Ninth, an active and interesting class can be organized. Tenth, cooperation, competition and leadership can be achieved. Team-based learning is an instructional strategy that enables Korean students and foreign students to make a team and to demonstrate their teamwork to the maximum extent and maximizes the class instructional results.