I was just thinking about this some more while doing some house work and chasing three sick kids. My child who shifted from the 13th to 80-90th, the various treatments we did definitely worked, but I think that part of the shift came from my trying a VSL spelling technique with her, which dramatically improved her spelling. I think she learned, through that process, to map her aural memory to her stronger visual memory (she's the opposite to me). I have learned to "hear" what I see if I need to remember it, I believe that she has learned to "see" what she hears in order to improve her recall.