공부
7개국어 언어천재 조승연 “한국인,영어 공부할 때 안 될 짓만 골라서 한다” | jobsN : 네이버 블로그
http://m.blog.naver.com/jobarajob/220941849843
Here are 250 Ivy League courses you can take online right now for free
https://medium.freecodecamp.com/ivy-league-free-online-courses-a0d7ae675869#.h49rcai4a