I added some of my opinions in on this. We do not need new information. When it comes to teaching we have to REsearch what we are doing.
REsearch begins with dialogue between teachers.
A dialogue about underlying theory is what we as teachers is need to be research and understand. The primary role of theory is to guide us in defining our purpose. As teachers we do need to know theory or else we would be ineffective teachers. Teachers like to recipe swap, I know I do. Something that works for one teacher might blow up in the face of another teacher attempting the same activity.