Hellow guys, Welcome to my website, and you are watching 수학은 틀리는 아이가 잘한다 - 박왕근, 폴수학학교 교장 / YTN 사이언스. and this vIdeo is uploaded by YTN 사이언스 at 2015-05-27T00:28:06-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
