There are two sides to that coin. Sometimes you have to fight for your kid. Here is an example.
We live in a lily white suburb where last I counted(my kid was in 8th) there were only 11 ethnic kids altogether in my kid's grade. That's all ethnicities other than white combined. My kid started the year(high school) missing 5 of the first 10 days of school because of away vball tournaments. She got a 15 and a 16 on the first two quizzes on Algebra 2. There was 0 communication with us. No emails or anything. My wife saw the first grade on my daughter's school app and messaged the teacher. No response. The volleyball coach is working from her end. No response either. My wife contacts the AP. Next thing you know we get an email from the math teacher saying she failed the second quiz and is no longer eligible to compete in volleyball. Mind you, all her other grades are A's. So we call a meeting.
In the meeting the first thing the lady said was Algebra 2 is above our kid's head and she recommends she drop out and take an easier course. I immediately got pissed. My kid has never gotten bad grades before, even in math. Instead of looking back and coming to the conclusion that there must be some fundamental thing she simply isn't grasping, she decided to give up on her a few weeks into the year. "Black kid not smart enough to grasp math". I get pissed and corner her on the fact that when she never notified us of anything. I also pointed out that as a soon to be D1 athlete, she needs that course, and she could lose her scholarship if her college saw that she failed a course or dropped it. So they agreed to let her retake both tests over 4 days. I could tell the lady didn't think it was possibly by her expression. We go home and start working with her. We found what she was struggling with and worked a few problems until she had a solid grasp on the mechanics. She got two 85s on the retakes(that's the highest grades allowed) and went on to do well from then on.
TLDR- Sometimes teachers think your black kid is just stupid instead of giving the same effort they give with other kids. Many black parents find themselves having to go up to the school. Lol