The causation between wealth/status etc. and test scores is fairly well established. I also provided you with scientific evidence that the 'scoring' German app

The causation between wealth/status etc. and test scores is fairly well established. I also provided you with scientific evidence that the 'scoring' German approach systematically underrepresented those otherwise equally capable, which is further evidence of that. Finally, the fact that migrant children perform so much more poorly in Germany compared to US/UK, while indirect, does provide more evidence for the pile. 'Test Scores' are not 'the best thing' for poor kids by a mile - they are merely an 'outlet valve' for some special kids from special families. I remember being at the home with a woman who married a Latino migrant in California. She was a cleaner. I asked the teenage children 'what university they were going to' and they balked, they literally had not given it a thought. In their 'family / lifestyle / education / community' - University was for 'rich people'. The daughter was helping out part time with the mom at the cleaning company, I'm pretty certain she will grow up to be a cleaner and that's that. What's 'best' for kids are good schools, good teachers, good mentorship, quality peers, and some semblance stability at home i.e. parents with stable jobs, not in jail, not evicted or homeless, not caught up in the drug world. Only with those things do 'tests' start to have some kind of meaning.