I've noticed you had EPGY through CTY. EPGY Open Enrollment has much lower cost ($135 for 10 months + $25 fee) and includes math K-7 and Algebra 8 - so math 6 and up may be worthwhile to try with little obligation.
You can move your child by .5 grade up and down easily, and your child can take Math and Algebra concurrently - e. g., Math for automaticity/timed drills.
To decrease problem repetition, the administrator can specify 'gifted' setting.
NOTE: EPGY OE does NOT provide class transcript and there is no teacher.
(EPGY OE also includes English Language Arts 2-6.)
Somebody on this forum has recently posted about an open group (or try melmichigan, here or on 'well trained mind').
