Depends a lot on the jurisdiction.
My kids never did anything that would appear to anyone else to be 'school' (apart from playing School with friends, a pastime that they used up years on), and where I live that's completely acceptable to the education authorities. Here, I have no idea how, it was determined that the education system is accountable to parents so it does not follow that parents who opt out of the system are accountable to anyone.
Today my kids are both employed, one is in college and the other has graduated college, both have a huge range of friends from various walks of life and age groups, and one supports herself entirely. They often remark on the tremendous ignorance of the average schooled graduate, including many students they studied with in college.
The curriculum is designed to manage mass numbers of people all kept inside buildings for most of the day. It's severely limited by that.
at 7:23 PM on Dec. 24, 2009