<p>If I have four teachers who've agreed to write rec letters for me (2math/sci, 2 humanities), can I mix and match them on the common app?</p>
<p>Sure; you just have to keep track of who is being sent where.</p>
<p>^can teachers see all the schools i’m applying to on the common app and realize i didn’t ask them for letters for this or that college?</p>
<p>Not unless you tell them.</p>