One thing that companies that deal with students (i.e. most of them) need to remember is that we like doing things online. It lets us do things in our own time, and removes the need for that pesky human interaction stuff.
If, due to server problems, obscure conditions in student discounts, or for some other reason, we are forced to do things the old-fashioned way and use the telephone, we will. Given that we are being nice enough to conform to your requirements - calling in & waiting on hold instead of just doing it all electronically - it would be courteous if you could recognise the fact that we are aware of the website, and would preferentially use it. Playing messages in your hold queue that send us to the website really doesn't do a lot in that direction.
Just thought I'd point that out.