I'd be great if a grade skip was a panacea, but it's not. Acceleration addresses the placement issue, but the pacing will still be wrong no matter what placement is made. These kids learn at a rapid pace, not the glacial one preferred by most educators. So if you skip your kid ahead, it might be the right level... for now. You'll be right back where you started again shortly.
However, placing at the right level for a short time is still better than placing significantly lower. If that's all you can get, skipping is still least-worst.
Best-case is a situation that runs at your child's own pace.
My own DD8 was in a public school for 1st and the beginning of 2nd grade. She was offered a GT pull-out for 2 hours a day to work on math and language arts one year ahead. And it was a mess. We proposed skipping her ahead one year, forget about GT for now, then let her re-enter GT again once she started leaving the other kids behind again. No dice... the school had an institutional bias against acceleration. Plus, we have reason to suspect that they needed another warm body in the GT class, which has become something of a political football in the state.
So, homeschooling. DD was enrolled in homeschooling as a 3rd grader, so we effected the skip ourselves. DW had to identify and address all the gaps created by the sloppy mess of regular class/GT for the last 1+ year, then let DD progress at her own pace. And we recently found out that DD has already run ahead of the current 4th grade class in math.
Too bad for the school, as DD not only proved our approach to the problem was the right one, but now they don't have her as a warm body in that GT class, either.
