I am dyslexic and could never show work when doing math. I still do it all in my head much easier then even using a calculator. My teachers would routinely give me a zero because I didn't show my work. I just stopped trying...

My fantasy school would have kids grouped by intellect not age. Every quarter is a new group of topics, taught by experts in that field. Children could take any class and progress at their own rate. I feel "No child left behind" eventually leaves every child behind.