The Dux Tefl/Tesol course is very good.Try it yourself!

This course explained the learning material at it's best.After completing this course there should be no questions on your mind regarding what/how/where to teach, whether it is online or abroad. This course in my opinion only had 1 flaw which is in the quizzes.Some of the questions asked in the quizzes were according to me irrelevant and the way i perceived it unnecessary to know regarding the learning work privided.These questions were only far and few as the majority was relevant to me.This course is also well laid out and is also structured in a perfect way!