I am looking for a TEFL certification online and was wondering what company is known throughout the world as a leader in TEFL instruction? Can anyone who received a certification online give me advice on which companies to stay away from and perhaps recommend one to me. There are so many and they all seem to be the same price. Makes me think they all are getting their lessons from one supplier and soliciting them. I just don't want to get caught up in a scam. Can anyone advise me?

i-to-i from the UK, recognized everywhere, i called several schools and asked what they thought of it, and if they accepted this accreditation, reasonably priced, very comprehensive, I found the grammar section HARD - and I have a BA and have never failed anything in my life - its a good deal