As far as stacking, it really depends on the store. For the edu, go to the link below and put your email in. It will send you a link to click on that populates an online use code and a bar code. If purchasing in store, either print out the bar code or just pull it up on your phone when you go in. They scan it right after they scan the Mac, and it takes 100 off.
I have successfully stacked the movers coupon on top of the student discount twice before. I tried to do it a 3rd time, and the associate said I could only use one or the other. As far as I know, their system will still accept both coupons if the associate is willing to scan them. If I were you, I would go ahead and get a movers coupon and give it a shot. The worst that can happen is they won't let you stack them and in that case you are still getting it for 899 which is a deal. If the stack works, you would get it for 809 which is even better
The stack will not work online, I tried it that way in hopes of an in store pickup and it only accepts one or the other online.
http://www.bestbuy.com/site/Global/College-Student-Deals/pcmcat276200050000.c?id=pcmcat276200050000