i'm pretty sure i just emailed them my ID number and said I went to the school they have a deal with (Berklee College of Music), and they let me go no problem.
if you do it, i would call them and ask what kind of student IDs they take. make sure they will take student IDs in general.
seriously, if that doesn't work call/contact sales at apple. they will surely give u a discount as long as you have that ID.
best of lukc