Recommendation/Testing Help

<p>Hey guys, I just have a few questions regarding recommendation letters and AP scores. I have noticed that colleges such as Stanford and Harvard have sections on their website saying they will accept supplemental recommendation letters. However, others such as Yale state they discourage such letters. Others have no such sections at all. Then, is there a general consensus over which colleges are appropriate to send in supplemental letters to? For example I plan on applying to Princeton, UPenn, Cornell, Columbia, Duke, and Dartmouth.</p>

<p>In addition, for AP scores, is there a time where we have to send them in by? Or do we only have to send them in for the college to which we are accepted? Thanks in advance.</p>

<p>-Xue</p>