It’s simplify to get backlink from edu site :-O
Hahaha, i’m not kidding guys.. just do it! and your site will be get backlink from .edu site 
1. Go to http://h2obeta.law.harvard.edu (Valid PR 5, check here)
2. Register for a free account
3. Create a new playlist
4. Just put your link and then publish!
It’s easy enough?