Mmmm...Polarbear reminded me something I meant to mention as well. My ds is in K and reads very well and is usually pleased-as-punch to show it off (at least at home). But we notice that he tires really easily with reading/writing. I think this is a developmental issue. He can read 2-4 pages of a chapter book, but then his brain shuts down. He'll look happily at a science book for an hour, because he's skipping between looking at pictures and reading small 'bites' of informations. Like, Polarbear, not saying that the tiredness is ALWAYS what you are seeing...but it may play a role especially when she's tired or focused on doing something else.