WPMU DEV Blog & User Creator Plugin
Batch create gazillions of blogs and users while setting passwords, urls, titles and more.
WPMU DEV Blog & User Creator Plugin is the quickest and easiest way for you, and your users to bulk create blogs and users and email out their passwords.
Bulk create new users, batch add existing users to a blog and mass create blogs – all combined into one powerful plugin.
Every day this plugin makes life easier for educators and their students on Edublogs.
Please visit official plugin page for more information