Hi people!
You have already noticed that there are methods that share certain characteristics, and I have found three of them that are similar. The natural approach, the audio lingual method and the situational language teaching are the ones that share the principle that language is learned for communicative purposes. The words natural approach leads me to think about the natural way in which we all have learned a language (Spanish). We learn from our parents, friends and different people, without noticing it. The natural approach concerns about rehearsing listening skills which is fundamental because we learn by listening, we need to develop it so that we can communicate with the others.
One of the points I consider is a disadvantage is that the students are not forced to speak English from the beginning; however, I consider that it must be the contrary because students should get involved with the language since the very beginning.