@ Shiya: Depends on who or where you want to teach.Most schools require a BA,Native English speaker,TEFL..experience etc.Like VincentNL I have the certificate but don’t regard myself as a teacher.Did some teaching in Guanxi 3 years ago,but told them to stick their job as my colleages spoke English that I couldn’t understand,and I did not like the association.You can do the course in 100 hrs.This is 1 week going full out!
Of course you will teach the children some mistakes,that is not easy to remedy later in life.But better some English than none at all I think.