First thing to say is that looking back over your posts she *is* making progress and in fact there may be a pattern of her doing a leap shortly after you get really frustrated! She is 6...
That said, one thing that helps my DS to focus on details is to make it explicitly adversarial - get him to imagine an evil faceless system that would just love to take a mark off him for something he understands perfectly well, except that he's not going to give it the satisfaction. He used to say, e.g., "Aha, they think I'll forget the "inches", but it's not so easy to fool me!". It's probably best to avoid making an actual human teacher the adversary though, and it does need to be explicitly a game!
