I put Missouri because I grew up there, and saw first hand how they dealt with the home-schooling system.
They basically butt out.
I, personally was mostly homeschooled, I went to a non-accredited Christian school for a bit as well, and then just took my GED and started college when I was done.
No one government official ever bothered my parents at all.
About 4 years ago, my parents decided to send my little brother and sister to public school... after two years they decided that was not so good of an idea, and pulled them back out. No one asked any questions. My sis is in a private school, while my brother, 16, will be taking his GED this summer and starting college next fall.
Missouri leaves it to the parents to decide, which is as it should be.
I also recall, when I worked at the high school as a choir accompanist... the girl that played piano for the high school jazz band was homeschooled. She just came in once every other day for practice. The school didn't give her parents any grief about it because hey, they pay taxes, right?!
Wow... I didn't realize that you even HAD to register in some states??!! That's just ridiculous!
Glad I know now!