The SAT goes from 200 - 800. If test prep raises average score by 100 points, there still is some room for the test to show actual knowledge. The college boar

The SAT goes from 200 - 800. If test prep raises average score by 100 points, there still is some room for the test to show actual knowledge. The college board says that an SAT is better predictor of success in college than GPA, which based on my experience of American high schools makes sense. I get that wealth probably has a positive correlation to both. But it seems that should matter a little.