I know a child who attended New Leaf, North Carolina (an Aspen school for young girls which is now closed) for eighth and nineth grades. She had been a top student before New Leaf and was an excellent student while at New Leaf. But, upon returning home, her new high school found her deficient in academics enough so that she had to repeat 9th. I think anyone attending any aspen boarding school should get a detailed copy of the school's curriculum and consult with your kid's home school to see if academic credits will transfer.