Hoe to use .edu sites to promote your keyword

There are many ways to promote your pages toward a special keyword, one of which is getting backlinks from .Edu websites, by creating profiles siting your page or by commenting in edu blogs and forums.

JHere is a good example of thius technique. A nice link with a good DA authority. The highest the DA authority is the heavier the weight of the backlink to back up your keyword  ranking which means page ranking of course.