Racism through testing
So from my experience with arguing with race-realists, the sentiment that blacks are dumber runs deep. Sometimes they try to justify it with bunked science especially dudes like Richard Lynn and his book IQ and the Wealth of Nations. These books obviously have racial biases within the authors, but they also have another thing. These books base their conclusions of the IQ test. The IQ test was originally invented by Alfred Binet and Theodore Simon. They were two french men and they had to create a test that would allow for distinguishing developmentally delayed children from normally intelligent, but lazy children. This test has been used throughout the years to discriminate against those who express intelligence in different ways, and the criticisms reflect that. From Psychology Today, "Criticisms have ranged from the claim that IQ tests are unfair to those who are disadvantaged, to the claim that the test items have changed little over the years, to the charge that IQ tests minimize the importance of creativity, practical intelligence, character, virtue, and morality, to the claim that all IQ test makers and theorists believe that intelligence is an immutable property of the brain".
How does this connect to the exam school test?
Well, similar to iq tests, there are great differences in scores between the races. In IQ and the Wealth of Nations, they make use of IQ charts which showed horrible gaps in IQ where Africa was down in the low 60s, while Europe was around the 90/100 range and parts of Asia were above 100. The ISEE has produced similar results where there is the over-representation of white and Asian students and the under-representation of black and latino students. Two conclusions can be reached from these differences (and I believe Mr. Kendi said this), either there's something wrong with the people (how race realists see it) or there's something wrong with their material conditions (my stance), or that there is something wrong with the test. I believe that if we were to improve the younger grade schools then we would see a more representative population in the exam schools.
I hope this makes sense.