Technorati

Tachnorati is a blog search website. It catalogs and organizes millions of blogs. You can search through the blog directory that is organized into different subject categories or you can search blogs and posts for key words. Unfortunately the blog directory didn't have subject categories for education or books. But you can search the blogs and post for those words. It also has a top 100 list. I would definitely keep this website in my belt as a resource.