Yup..It still goes on to this day.. Black boys being put in special classes in order to help them ''process'' information more easily. It's all coded language, but it's easy to read between the lines. If they gave enough of a damn to try and treat Black students as students instead of outsiders in their own schools, there wouldn't be as any issues. I was held back a year because of bullshyt like this and it still makes me mad to this day about the time I wasted..
When they don't outright express their BS like your kindergarten teacher did, they tend to just be very condescending and patronizing to their Black students... I hope your Mom was able to take legal action against your teacher back then and get her removed cause who knows how many kids she could have said that to.... Like
@Poitier said above.. Black teachers truly matter.