Not sure if you mean a double skip all at once, or a second skip after one has already occurred. Our first was early entered, skipped once (skipped fourth grade), and now is homeschooled, with a nominal grade for reporting purposes only. It doesn't seem to have been a source of difficulty socially or with regard to work skills, and probably was inadequate academically both times, especially in math, but was sufficiently within range, when combined with positive social experiences, to be net successful. We did have the advantage of excellent fine motor skills and advanced social skills. Also teachers in tiny private schools who chose to make allowances for age-appropriate executive functions, and enjoy cognitive/academic strengths.
