I don’t know what the “usual range of learning challenges” is. We don’t have that here. Those “remarkable math and computer skills” your son has – those are a challenge for my daughter to acquire. Her difficulty with math is compounded by her reading difficulties. Add a writing disorder and it’s a trifecta that touches nearly everything she does. She is a bright kid, but there is no just “getting over it.” However, if you think your son has gone as far as he can go, he probably has. In that case, I’d encourage him to pursue a tech school or one of those on MYOS1634’s list. If you’re full pay, your son probably has a lot of options.