raise, as these parents say well-rounded kids who will not become just smart adults, but good people. >> brodie is also concerned that many states don't require parents to have any training. although many who home school wouldn't be happy about the government interfering. still the best homeschoolers realize their limitations. they must bring in trained professionals into their children's lives or form networks with other educators so their kids are getting the education they need to make it into college. john, kiran? >> fascinating. very fascinating and it's doubled in the last decade. amazing. carol, thanks. >> sure. >> and if you'd like to weigh in, it's on our blog cnn.com/amfix. >> meanwhile, 31 minutes past the hour. a chopper goes down in afghanistan. nato says it was a helicopter crash in southern afghanistan this morning that killed nine u.s. service members.