Well, it got me into some trouble. I basically destroyed my teacher's plan of early physics education. Basically, the teacher wanted to replay physics history a bit by explaining the early experiments and what people thought about them.
> How fast should you accelerate your kid in math?
My answer would still be: as fast as your kid wishes for but consider social implications with teachers and peers.
Sidenote: after this experience with the teacher, I somehow switched to computers. Exploring computers and learning to program wasn't a subject in school so this was free territory.