That’s right how to do it? easy, and of course it’s free, let me straight to the point, some of .edu blog allowing you to sign up and let you create a sub directory .edu blog, by using this google search query:
“powered by WordPress MU” inurl:.edu
you will see results hundreds of .edu wordpress blog, just go to sign up page and register yourself for a blog.
Some of blog i’ve found is:
http://blogs.slis.ua.edu/slis/blogs/wordpressmu-1.0/wp-signup.php
http://clove.edschool.virginia.edu/wordpressmu/wp-signup.php
