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.
Yes... a friend of mine teaches high school math and says that it's shocking how poor some students' basic math is. Her cognitively typical primary school daughter has better skills than some of her high school students (because she spends time after school with her daughter to make sure her math skills are solid).
