Can someone please walk me through how teachers submit their recs?

<p>My teacher wrote the rec but he doesn't know the process of submitting it through Common App. He made an account a year ago so he doesn't remember the login information. I think he would prefer to submit it online so can someone please tell me step by step how? He showed me the email he got when I invited him and neither of us saw any kind of link :l</p>

<p>Go back and look at that email again and if it has a paragraph like this one, click on the hyperlink in word “here” at the end:

</p>

<p>Thanks. Is this from the email they get when you invite them? And also just in case can you tell me what I have to do if he chooses to mail them?</p>