Generally speaking, you don't want to skip grades because the stuff in each grade is supposedly valuable and you should take it. So, the solution is to take two

Generally speaking, you don't want to skip grades because the stuff in each grade is supposedly valuable and you should take it. So, the solution is to take two grades at a time. Unfortunately, not many institutions are prepared for this. In my case, I just studied at regular speed at school, and at home my older brother kept me up on what he learned about the topics that interested me (math & science). During regular school classes I enjoyed the ability to re-think about the stuff I already knew, and the extra time I didn't need to devote to them was time I did spend thinking and experimenting with other subjects like philosophy, writing, or computers and videogame development (I designed, drew, encoded and compressed the maps for our first two commercial games all by hand during class - but this was back in the 8 bit days). I think the chance to experiment and pursue my interests without pressure or obligation was incredibly valuable.