Dear Luiz,
I’ve read your post about knowing that and knowing how…I firmly believe it makes a big difference and most of advanced students present some inaccuracies in grammar deriving from the way they were exposed to the topic in their learning process. I have also done some research on Noticing and interface position. At a first glance, it seemed to me something really different, but as I saw some examples and tips on how to help students noticing, I realized it is very similar to the communicative approach. Am I right? I would like to hear your opinion.