I have not really thought of incorporating RRS feeds into school media centers until now. Before I mainly used them for personal and professional development. I would subscribe to Twitter handles I followed, as well as news websites and other blogs.
In an educational setting, wikis and student blogs could be a beneficial place to add RSS feeds. Some wikis have RSS feeds to alert members when content has been added or edited to the wiki. Instead of constantly looking for updates, the RSS feed can now do that for students and teachers. Blogs are another place to use RSS feeds. Students in an English class may each haveindividual blogs, and they could be required to post and comment about the book they are reading. An RSS feed is a way to inform students about new posts as they become available.
Right now, I think RSS feeds are more widely used on a personal or professional level, rather than in schools or libraries. But I think that once the current generation of school-media students graduate, there will be an increase in the schools and students who use RSS feeds; the teacher-librarians will bring that technology to school-media centers.