Depends on your state. I'm in Ohio and that's perfectly permissible. Under the Ohio Revised Code and the State Operating Standards for Schools you could do that

Depends on your state. I'm in Ohio and that's perfectly permissible. Under the Ohio Revised Code and the State Operating Standards for Schools you could do that and have it be considered a) home schooling or b) a private school where you would be exempted from a large portion of the operating standards. In other words, you have significantly more flexibility in how and what you teach.