It is possible the IAS has changed on this issue. DD13 had her first grade skip when the 2nd edition was the most current, and sibling receiving grade was listed as a disqualifying factor then. For her second whole grade acceleration, I did not as thoroughly read the 3rd edition (especially on this issue as DD18 was 4 grade levels ahead of DD13 at that time).
Even though they ended up 3 grade levels apart, there were still sibling rivalry issues. DD18 did not appreciate DD13 being a freshman in HS during DD18's senior year. Depending on the attitudes of the kids, I think you may always end-up with sibling issues.
--S.F.
Last edited by SFrog; 10/28/14 12:24 PM. Reason: gooder grammar
