EOS was established in 1992 and started the institution in 1993.
Today, EOS is one of the best ESL educational institutions for children in Korea.

Moreover, more than thousands of students have gone through the main campus and attending or graduating Universities like UC Buckley, UC Buckley, UCLA, Indiana University, University of Texas, New York University, Cornell University, Harvard University, Yale University, UIUC, North Western.

Since 1997, EOS have been increasing the number of sisterhoods with institution in the United States, shared learning methods/programs, and participated in the summer institution to differentiate from other English education institutions.