<p>Will it really make a difference if I send a letter to Princeton or not? He says that they'll get a record on me and it will improve my chances of getting in. But I really don't see how that would work... Has anyone done something similar in the past?</p>
<p>If so, what should I say, how long should it be, and who should I address it to? The class requirement is only around two paragraphs, but if I'm going to actually send it I want it to be pretty long.</p>
<p>Demonstrated interest (visiting, letter writing, etc.) has no impact on admission decisions. If Princeton is your first choice then tell your interviewer. If you do choose to write a letter I would recommend keeping it short.</p>