This could be challenging... our school would handle it the same way, no HS credit. I would think the only reason you would actually care is if she plans to graduate from high school early. If you are just worried that she won't have four years of math in actual high school, you can explain this on the college apps and note the grade she received with the explanation. I guess I would hang onto her middle school report card as proof, but very much doubt it would be requested.