Early High School Graduate Needs Help on Application

<p>I haven't had much help on the college application process.
I'm not really sure how to utilize the option to explain my reasons for graduating early on the commonapp.
I'm applying early decision to Cornell soon.
I have well thought out reasons- I've planned for it since eighth grade. I have long outgrown the education style and environment my high school has to offer me. I feel I am capable of learning at a college level, and have actually taken two college courses at a local community college and finished with A's. As for the maturity level, I know I still have a lot to learn in life, but I know in a year from now I will be more than ready for college (I will be 16 and about 11 months when entering college). I'm ready now. Socially, I am more comfortable around people older than myself-in fact, the large majority of people that I am friends with are several years older than me. I'm not worried about this being communicated to admissions officers, because I know my recommendations will explain my preparedness better than I ever could myself.
I'm wondering if I should submit the supplement that is an option, and if so, how would I go about it. What should I include and not include? Thank you for any advice.</p>