KES: In that case then yes academically your child will be bored out of her mind if he is way ahead of her class. You can cultivate her academic curiosity outside of school, and when the time comes have her skip to a grade level where she is being challenged, but then that might introduce issues not related to academics like social and maturity issues, if she is significantly younger than her peers.
I think in your situation, homeschooling might be an option for your child. Something I will leave you with, there are successful and unsuccessful kids that come out of public, private, and home schooled backgrounds. The take away is by having parents that are involved and sensitive to each child's education needs then they should reach their academic potential. Take into account what would be best for the whole family and not just the child. If ER is important to your family then sacrificing potential income to be a stay at home parent to homeschool could cause potential resentment, unreasonable expectations, or unintended pressure on the child.