Originally Posted by madeinuk
Perhaps I am wrong but what I have read over the years has given me the impression that these prep classes the educational equivalent of colonic irrigation treatments. Something people with more money than sense spend their money on that has NO proven benefit.
Somewhat related blog post: Test Score Gaps in California Increasingly Driven by Race, Not Class. One would not expect this if SAT score gaps were primarily caused by differential access to high-priced SAT prep classes.