I completed the 120hr Professional TEFL Program online. This is a great course with very in depth information. It is divided into 13 modules, each with several units. There is a lot of text to read, I liked this aspect of the course but some might not enjoy this method of learning. There are several test questions as you progress and then test questions at the end of each module. There are also videos to watch showing real life lessons, I found these particularly useful. It took me several months to complete but I was doing the course in my free time, working it around my job and other commitments. It could take only a few weeks if you worked on it full time. I paid £99 for the programme, it is a cheaper than some of the other online TEFL courses out there. If what you want is a reasonably priced qualification and you are not bothered about the dense text, then I would definitely recommend the 120hr Professional TEFL Program online with TEFL UK.