<p>Yes, it is possible for students to have a disability and have it impact them in a single area. Based on the OP’s description of her son having poor computational skills, problems understanding direction (N,S, E,W), etc., it sounds like he has dyscalculia. <a href=“Dyscalculia: Symptoms, Causes and Treatment”>http://www.learninginfo.org/dyscalculia.htm</a> I also agree with the OP that the math on the SAT is superficial. Questions designed to be able to be answered in seconds are not deep challenging math problems. I suspect he is incredibly gifted and compensates for his disability which masks his deficits. (I have 2E kids who are dyslexic and they do that from the other direction.)</p>
<p>Where I am thoroughly amazed is that he managed to get through any AoPS courses at all. But, the student could probably use that experience as a way to judge what having a career in engineering would feel like to him b/c he won’t have someone tutoring him to solve problems at work. That is what he would be hired to do independently. The question is if he can realistically progress to that level of independent mathematical ability AND be able to perform on the job at the same level/pace of other professionals in that field. </p>
So there ya go. Best way to really know something is to teach it. He says he’s not sure how well he’ll do, but he’s going to try.</p>