Using the search box presented, search for and click the listing for Purdue University.
If you are on campus, click "here"; if you are off campus click "go".
Whether you are on campus or off, you will be asked to enter your Purdue email address and a password, after which you will receive an email within fifteen minutes from the NYTimes requesting that you confirm your email address. You will then receive confirmation that you have an Academic Pass.
If you have difficulty registering for a pass, email firstname.lastname@example.org from your Purdue email account.