How would you ever know?
It's not one of those things you can put a finger on, especially if you are not looking for it, but something usually nags at you that your kid might be getting a raw deal. Pay attention, does your black kid get in a lot of trouble for things a kid their age normally does? That might be a problem. If your kid is one of few in his class, chances are he IS getting a raw deal.
Bias Isn't Just A Police Problem, It's A Preschool Problem
New research from the Yale Child Study Center suggests that many preschool teachers look for disruptive behavior in much the same way: in just one place, waiting for it to appear.
The problem with this strategy (besides it being inefficient), is that, because of implicit bias, teachers are spending too much time watching black boys and expecting the worst.