I was basically unschooled until I was 6. I was multiplying, doing long division, and reading Goosebumps by the time I was 5. When I was 6 I started straight up homeschooling, and now I'm 15 starting AP Calc AB, and my second year of Physics. My writing is admittedly quite awful unless I have an interest in what I'm writing, but when I care about it I get plenty of compliments. But what's best for me isn't best for everyone. I'm sure public school would have slowed my learning, while my sister thrived because of the high level of social interaction. Different strokes for different folks.