I recommend the IntrepidTEFL course

I spent an hour looking through different companies and courses on the internet. I even used Perplexity to help me narrow it down based on what I needed. There are literally a hundred places to choose from. I don't regret my purchase, but I did get annoyed with a few things: no problem with the Ai voice videos as it's a nice bonus to have video which most don't seem to, but they should make the videos shorter and scatter them around with split up text; there are too many questions in my opinion - it'd be much quicker to finish if there were less assessments; and we shouldn't have to pay extra for verification in 2026.

Aside from these issues, I did learn a lot of interesting things about teaching English and feel pretty much ready to teach it, though I'm unsure of whether that will be online or overseas. If you can handle a bit of over-teaching, this is a very good course to use.