Looks as if we may be seeing if we can draw some useful lessons from Oregon in the near future.
From one part of their campaign section:
"Regulation does not help home educators. Home educated students' test scores are the same in states with no substantive oversight of home education as in states with high control. "
That's interesting, since in the UK we hear reports of instances where the learning of some home educated children was actively damaged by insensitive state oversight, with children ceasing to learn effectively for extended periods of time as a result of the anxiety that the interference caused.