I believe there's an epgy open enrollment group that someone here facilitates. That's what we're considering, for the same reasons. (The OE groups are a fraction of the cost of EPGY and use the same self-paced software, just without the input from a Stanford tutor, if my understanding is correct.)

The open enrollment would also include language arts. I'll be following to see what others say. Our ds is 6, so new to this!