We don't like to admit it these days, but humans are not identical. We can accept some basic differences, such as skin tone. We get extremely uncomfortable extending that notion to cognitive skills. To be clear, I'm not singling out any group -- I'm not linking skin tone to cognitive skill in any way.
So, we bring in standardized tests to level the playing field. At first, those tests are deeply flawed and filled with bias, making them especially harmful.
Then, we iterate, and remove those testing flaws. And we trick ourselves into thinking that will solve the problem.
But, suppose we arrive at the perfectly fair test. Suppose the test is highly predictive of, say, success at a 4 year college.
Now, what do you do if that test habitually ranks some group lower than other groups? To me, it feels like we are right back at square one.
Personally, I would prefer to focus our energy on helping each other out. If one person, or group, is falling behind, you find a way to help, and also to integrate each group into the whole.
I know I'm oversimplifying -- I just think standardized testing is a fruitless exercise.