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be sure that the stories and information she's getting down via hw are comparable to the detail and length of what she's capable of telling orally

I hesitate somewhat to post this, since I am treading in unfamiliar territory here, but I am VERY sure my DD9 does not have dysgraphia (she has beautiful handwriting, draws beautifully, and produces voluminous writing) but I would say she probably still can tell a better story than she can write. She's very verbal and the words just spill out a lot faster and more fluently than she could write them down. At the same time, her writing is way above grade level as well.