<p>They are very clear that they do not want an extra resume. A writing sample is probably unnecessary since you should be able to show that you can write well in your essays. </p>
<p>My guidance counselor did suggest that I submit a research abstract, so I suppose if you've done research a supplementary abstract won't just be discarded.</p>
<p>It does seem that the admissions guidelines and my counselor's advice contradict each other... but seeing as I'm a sophomore at Stanford now it clearly didn't prevent me from getting in. I also mentioned it in one of my essays. On my admissions letter there was a handwritten note saying they hoped I'd continue with research at Stanford so it seems like there's a good chance that they 1) read the abstract and 2) felt it enhanced the application.</p>
<p>I don't know about ... because I asked the regional representative who reads the apps in my state, and he said it only makes you seem dumb and can't follow directions if you submit extra stuff when they specifically tell you not to.</p>