This is easy to achieve.
Take points from the hardest working white and Asian students, and add them to certain AA and Hispanic students’ scores.
Hey, it works with income...
I sure hope nobody from the NEA reads your post, for I fear a hijacking of your idea would be in the offing! (As in, let’s take away from the intelligent and diligent students’ excellent grades, and give a portion to the lazy or less gifted children, and then they will all have equally good grades, Kumbayah....)