It solves the problem of having teachers and nurses who are aware of and have the proper concern for your child's condition. It solves the problem of needing to be informed quickly when there is an emergency. It solves the problem of worry over medication being given by others. Some studies (I'm told) show that children that are shown more affection have stronger immune systems. While parents who send their kids to public or private school certainly would not necessarily be lax in showing their kids affection, a homeschooling parent has more of an opportunity to do so. It avoids the constant exposure to colds and flu that happens in public and private schools. There are about a million other reasons that have nothing to do with CAH so I'll just leave it at this.