I could be wrong, but I think the 25% discount is something the airline applies (like how under 2's fly free), this might also be applicable to a student fare. HTH

ETA. If you're not wedded to booking with the agent you're talking to, PM me and I can send you through his contact details and he might be able to help you out if it is an international trip.
Do you mean that I could hit them up for a 25% discount on the student fare? Or am I being just a bit too optimistic there lol?

It is an international trip but for now we're just figuring out timing/costs/if we can afford it. I'm not wed to any travel agent so if we decide to go ahead with it you might get a PM