Oh dae kyo, Hwang Sun Chan
Oh dae kyo Korea's No.1 CSAT Specialist Oh Dae kyo 2004 Preliminary Examination of all the pre-college entrance examinations The first place in the nation. take CSAT 10 times (the humanities 5 times, the nature 5 times), billion won annual salary in 20's, 16-year career star instructor, Representative Oh Dae-kyo, CEO, All Education, 《30 days 1st grade improvement absolute learning met...