That's cool that your brother was teaching in Korea and I hope he had lots of good experiences. I only worked for private (businesses/tutoring) academies (학원) and so I never worked at any government (EPIC connected) schools.

I lived in Korea around 5 years in total and discovered that I didn't actually enjoy teaching English (or anything else, hahaha) so I quit doing that at the end of 2010. The only way I would ever travel the world in the future is if I had a lot of money. It's not quite as fun if you are working most of the time and trying to travel during short vacation times, etc.

Anyway, I hope your brother has tons of fun on his world tour. I'm sure he has earned it by dealing with the huge stresses of teaching emotionally/socially unpredictable kids. hahaha