Educational license

I was wondering if anyone can give me the scoop on how an educational license would work for these. I have 7 macs that all have Garageband installed. I am hoping to get these packs on each of these machines. Would I have to buy each pack 7 times, or does one license apply to my site.

I contacted apple and they said that I would have to purchase a box for each station. This doesn't sound right, as all other software offers a volume/educational license.