<p>I am terribly sorry if the answer to the following question has been posted numerous times on College Confidential. It's finals time. Can't be spending all day on this website anymore. (Just kidding. Twas a joke.)</p>
<p>How many professor recommendations do I need for the following schools?</p>
<p>Cornell University
Northwestern University
Duke University
University of Pennsylvania
Yale University</p>
<p>Would one recommendation be frowned upon? After all, my smallest class has 80 students...and none of my lecture classes are necessarily interactive with the professor.</p>