Communicating to Teach or Teaching how to Communicate?

Both are valid!!!...
In the Communicative Language Teaching approach, communication is the basis.
It is quite important because language is presented in a real context and this suggests that there should be a variety of linguistics forms by taking into a account the intentions of the speaker.
As it is based on communication, is necessary to give our students oportunities to express their feelings, emotions, opinions and ideas.

We as teachers, should prepare situations in which our students can feel identified and can have the opportunity to communicate.
This approach is really important although may be complicated to have a 100% communicative class.