Yep. I have heard of it & always wondered if that's my problem. Like Dyslexia it seems to manifest in different forms with different people. Most teachers haven't heard of it but it is debilitating & calculators are a godsend for people like me even for simple math. Anything complicated & I can't even remember the procedure so can't apply it on the calculator. Pages of figures are so overwhelming I can become physically ill. And like a dyslexic I have a whole heap of hacks to get around mathematically. For me, I don't learn in *straight lines* ~ which is how math operates. I tend to see the big picture & work backwards from that & that doesn't work for math.