I just had to laugh when I read this thread because I REALLY don't fit under any definition!!
I teach my 7yo his grade 2 curriculum, not at home, but at the kindergarten where I also teach my 4yo and 3 children from a Children's Home. So I'm not schooling at home... I'm not doing public school.. I'm not in a private school, unless a class of one qualifies... hmmm! I'll have to create my own category!!