Well, you have articulated this story in a piss poor way. Nowhere, in any of it, do you describe ANYTHING that's racist or involves racism.
Basically, the only reason race is involved in the whole conversation is because YOU are making a big damn deal about it.
Now, had you said "A white kid is going around calling this black girl racist names, and the school board said she had to deal with it" then that would be racist. But according to you, he's just being a dick. So either it's not racist or you just failed to explain the situation well enough.
So unbunch your panties and stop calling "RACISM" when it's obviously not there. Or learn to articulate yourself in a way that includes THE WHOLE story.