ClustrMaps help to track the number of visitors to each blog and show the location of the visitors. To add a clustrmap to your student blog, visit the clustr maps website, enter the URL of your blog, copy the embed code and place it in a text widget in a sidebar of your blog. This requires the use of an email account to receive the password
This version in the link below uses built in plugins in the Edublog dashboard but requires an Edublog Pro or Edublog campus account.
Note: I added the clustrmaps to each of the blogs in the class. That way I control the password and the clustrmpas account but the students can see how many visitors they have on their blogs.