Recently, after the "Intensive English Education System" has been promoted by the Korean government, it has tried to find as many qualifed instructors as possible.
TESOL certificate not only serves as a very important evidence to prove the quality of English native speakers, but also serves as the means to determine one's salary in countries that does not have English as the mother language.
Let's prove ourselves with the TESOL certificate and improve ourselves as an English teacher!
Click... http://www.stesol.com/