When I worked at Costanoa Continuation School, I used to be a teacher for those kids. However, I have also worked at the other extreme as a teacher who worked with some very privileged people in some of our homeschooling programs.
There is no doubt that students need teachers who have the cultural compentence to understand their worlds. I've seen some of the videos to which the article refers, and they are very disturbing, as are the statistics. It's a reflection of upward trend of intolerance in greater society.
This article gives a concise view of what institutional racism looks like. The "carbon monoxide" analogy works well. The importance of recognizing our own biases is a good reminder.