Wordpress
http://wordpress.com/
Participants wll use this site to create their own Worpress blog with multimedia added. This will be a generative learning assignment because the participants will be creating their own blog. The blogs will be designed for their students.
I chose this site because it is free and they can use their own e-mail account and not have to create a new Google account. Also Wrodpress is not a site blocked by our school system.