This arrangement of Deck The Halls, an old Welsh melody, started out to be a fairly basic fingerpicking tune. The first verse should be very playable for students who have with some alternate bass style skills.
There is also a variation, Verse 2, that will be a bit more challenging. But you should be able to find a middle point somewhere in your own comfort zone. You might also enjoy taking the extra challenge of 'The Hard Part', which includes some very fast changes.