My DD8 is going through the same thing right now. I'll be busy reading the suggestions

. I've been using the read it aloud to me approach for instructions or some harder 6-9 grade problems that the GT teacher has given. We also remind (ie nag) her a lot which I'm sure isn't good but it drives us nuts. I'm sure we did it ourselves as kids also.
If it makes you feel any better, I have heard the same comments from 3 or 4 parents of DD8's friends (most likely GT as well). Maybe it's just the age/stage that we go through when we are finally asked to do something where paying attention is required. our schools don't seem to emphasize this until 3rd grade (ie reading for yourself). So even though I would try at home with various activities last year, it is different when it comes from the teacher in a larger group. At home we can remind them to check work, etc but a teacher with 24 can't go to each individually and remind them. I'm sure that kids probably don't think "group" reminders apply to them.