quick update for anyone contemplating this approach. After speaking to the school I sent an email to confirm the meeting time. In the email I outlined our goals for DD (happy and good self esteem + continued love of learning) I also specifically requested information on how to accelerate her in math without undermining her future teaches.

I feel this worked extremely well, as although the email I got back was very short - it did contain links to the entire primary math curriculum and tips for teaching it at home (usually handed out at the beginning of each year) So it would seem that provided I teach within the curriculum school can accommodate.