In our work at Edge Hill University, we find that getting people to subscribe to blog feeds can be difficult because it seems like a new technology to understand.
If a class was using blogs in the course, and the teacher wanted to keep track of all the posts, they would need to.
If they don't want to use feed aggregators in for example Bloglines or a web browser, they could use www.feedblitz.com
I'm still testing the site, but I think that you register at the site, then subscribe to the blogs you want to keep track of. The service will then email you with the new posts each day (I think). I'll post again when I've tested it.