I want users for my blog, but not all of them want their own wordpress sites. Let's say I'm a teacher and I want my students to be able to blog on the wordpress site and their display names to show for each post, but not every student wants to also have their own wordpress site, they just want to be able to contribute to mine for class. Is this possible? When I send out invites and someone registers, they are forced to create blogs.
The blog I need help with is vxrodriguez.wordpress.com.