I'm working on an iPhone app that unlocks further content through an in app purchase. However, I'd like the ability to offer a student discount for the upgrade. I tried creating a second in app purchase at the discounted price, that you could download from the app after entering a "student code". Apple rejected this as it violates 11.1 of the app store review guidelines. I think they are treating this more like we are selling student codes somewhere and this is outside the in app purchasing.
Is there no way to offer a student discount rate?