In addition to ad-free streaming for "the duration of their student life," students also get access to offline listening and the Premium tier's improved sound quality. Students simply need to head to Spotify.com/student to sign up and SheerID handles all the business of verifying that you're actually a student. Note that Spotify doesn't clarify how many years the deal is good for, but in the US at least users get a one-year discount that can be renewed up to three times for a total of four years.

The full list of supported countries: