Here's a couple of thoughts. I don't know how useful they are.
Work with the parent, work with the kid, if they say they need something they do. Take charge so they feel confident in your plan. It's their education . It's your class. A warm and capable personality goes a long way.
They go to school to learn. You go to school to teach. Have high expectations. If they don't reach those expectations don't lower the bar, figure out what the hinderance is.
I've read that writing is something that would improve if it was assigned more but they longer to read and give feedback on so it is assigned less. I've read that parent voulenteers can help with that load if you give them a clear ruberic.
also: google this:
"davidson gifted for teachers"
there's a variety of topics.
someone posted a link to share with the school about giftedness. I don't know what thread it was in.