I have a thought on this. Our daughter skipped third grade and is in fourth now. She is highly verbal and we were worried about some gaps in other areas. The only gaps we have found are some math facts and rules, which she is still picking up quickly. Her writing and reading is a non-factor. We were very worried about social issues and leaving her close third grade friends, but she has worked it out and it was a good move for us. She has to work a little bit now, but it still comes easily. Leaving her in third grade would have been a waste of a year. She has really enjoyed fourth grade.
We also looked in a private school for third grade. After testing her, they old us that she would probably do better with a grade skip at the public school and if we wanted to go private, reapply next year as a fifth grader. That turned out to be good advice.
