<p>I read messages from a while back that said that it does but it's website never specified?</p>
<p>The website says “two teacher recommendations”, but you are strongly advised to obtain recommendations from 11th and 12th grade teachers. It’s also better if both of them have taught you in different subjects (preferably one from the humanities and one from math/science), since they’ll be able to comment on your performance in different academic areas.</p>
<p>On a related subject, the supplemental app says you should give your teachers marked envelopes to Harvard Admissions . . . ? But doesn’t the common app already have the recommendations on it?</p>