Not sure about the educational discount - the link is only available on the Main Apple Store page, not the education store. It is always there, but you can only accept the conditions and go through to it on a Wednesday (sometimes not at exactly 10). It's worth phoning the Apple Store and asking about the Edu discount, though I doubt they'll do it....
If you do go down the Refurb route, it's good to get someone at the Store on your side before you go to buy on the Wednesday, and then call them at 9:55 - that's what I did and both ladies I spoke to were very helpful, (with lovely Irish accents...). This way, they can check the system and put the order through quickly for you, before anyone else swipes the bargains.
PS The link looks like a recycling logo, and is near the bottom on the right.