Depending on how you're school is set up, you may want to think ahead about schedule challenges with subject acceleration. With DD11, this proved to be the biggest challenge. With her personality, she really likes to be part of the class vs independent study. The school recognized this more than I did and found a way. When the classes aren't available in the building (ie elementary vs MS), all concerned may need to think out of the box. With a 2 yr acceleration it will be an issue for longer. We are counting the days until MS when they will offer classes through Geometry at the same building!