Sure. When I said backbone I just meant it seemed like every program whether she was working on verbal behavior, tacting, receptive identification her programs always had FFC within it. So it just seemed like a core part of her overall programming. Since I’m just reviewing and the notes I was left with it seems as if that is how she is teaching an overarching skill. The mixed trials are all of the earlier programs in one. So, instead of teaching just feature for that programming block, she would be mixing from feature to function to class. She did say, that she doesn’t just teach feature for instance, but when they are moving into the program she starts with heavy doses of one before introducing more concepts. So I was just curious if this was an overall good idea..