I am one of them.
I'm another. Was really great at math stuff. In 7th grade I got 100% on everything (tests, exams, homework, quizes). I only got a 99% once and my teacher had a little fun with me on that. Ended 7th grade with a 100% overall grade! That only included a little bit of Pre-Algebra. Then came 8th grade and Pre-Algebra. Think I ended the year with a low B. Then came 9th grade with Algebra I. I sucked at it, and my teacher went so fast through everything and refused to slow down. When anyone asked her if she could go over that again she just said "I'm not slowing down just for one person. Just skip it and do this." I did ok the first half the year, but the second half I couldn't keep up, and I barley passed! I had to leave that school and finish the year home-schooled just to pass! This year (10th) wasn't any easier, and it takes me longer to understand AND remember something than someone else. Most other kids can learn stuff and remember it in about 2-5 days. For me, it takes about 1-2 weeks because I'm a bit slow and have one of the worst memories in the world! I can't remember much about what I did the other day, and would have to go back 1 lesson to remember it. So, even as Cyber-School'd I had alot of trouble with Algebra.
Compared to many other people, I'm stupid. The only things I can do is computer stuff, and most things electronical. I can fix my computer, or make a game work on my PS3, but anything else I just don't get because I'm not too smart.

Think I might have A.D.D. too.
Still don't know if I passed 10th grade yet.