Fax. Plus, if the parent is intelligent, the child will learn just from being around the parent as a result of both genetics and experience.

The truth is that the public school system is an outdated technology. It used to be in part a storehouse of knowledge, much like a public library, but if you have internet access and a parent willing to take the time to assist the child to source information, the boundaries of knowledge far exceed what any public school can provide.