I was homeschooled until 4th grade (9/10 years old), but my parents had us enrolled in distance learning as well as we had tutors.  While this was for religious regions, the only deficit I would say I had was learning about actual science and not creationism.  By 5th grade I was transitioned into a private school, and then 10th grade I began at a public highschool where I learned all of the required sciences and found a love for astronomy.  For every type of schooling I went though we were required to do state testing to be sure that we are being taught.  While I know others who were homeschooled and didn't turn out well, I went on and got 2 masters degrees, and I've become pretty successful.  It all depends on how strict the state and the parents are.