<p>BDM,
Some people are simply not good with SAT. It includes kids who have never had a “B” in their life. I know one - my D. In her case, it is her slow reading, which actually is very helpful (specifically in science classes), since her reading comprehension is very high. Reading score has always been her lowest by far on all standardized tests (starting in elementary school) with English (writing) being highest, which is also very helpful in college. There is some correlation between tests and GPA, but in some cases it seems not to be very strong.</p>