<p>They can either do it online or by paper. If by paper give them the envelope and the teacher rec letter form printed from common app at the website (downloads).</p>
<p>Its best if you submitted some part of the application before they send it, so they have u in the system</p>
<p>I suggest asking them to do it online. Some of the teachers have pretty bad handwriting and generally, when people type they are more conscious of what they are writing for they can go back and edit it while when you write with a pen, you sort of have to just keep moving.</p>