Just some perspective, a GE of 9th grade in math is equivalent to knowing some basic "solve for x" type of prealgebra. It says more about average 9th graders than it does about the younger kid who got the score. If he has mastered the fifth grade EPGY material that he has been exposed to, then it doesn't surprise me at all that he had a GE of 9 in math. Average high school students don't do well at all on math tests. It's truly frightening.