<p>The op asked specifically about Stanford. It is well known that Stanford only looks at grades in academic subjects after freshman year and computes a GPA for admission purposes. It also likes to see ECs and other interests for which the applicant has shown continuing involvement and, preferably, passion. I can't say that, beyond that, it wouldn't hurt to be ranked highly in your class, by whatever eclectic method you HS might calculate it, but the school report and mid-year report should provide amply opportunity to make everything clear. After all that, his letter is not going to help or hurt his chances to a measurable degree, if at all.</p>