She sounds a bit like my son but since I can't get that sorted I am no help. The only thing that has helped so far is the teacher let him write a non-fiction response to her writing prompt. If he doesn't have to make stuff up it seems to go much better. The other thing of course it your dd may have written 2 good sentences and the majority of the rest of the kids may have written 1 to 2 pages of drivel.