Depending on your country of choice, you might be better off just doing private lessons. They can be inconsistent but they pay a lot better and you know that your students really want to learn.

Since you already have teaching experience I don’t have to tell you that classroom discipline can be a problem. Add in a classroom of English learners and it can be positively chaotic, especially if they are teenagers.

I strongly urge you to have a solid grasp on the native language of whatever country you are going to. If you don’t, you will be in for a world of pain both in and out of the classroom.

Good luck.

There’s a good site called tefl.com – but you need to pick and choose.