Now that we have created our node types that will create our groups, we need to assign permissions to allow users to create groups. In this example, we will allow teachers to create classes, and both teachers and students to create clubs. To set these permissions, click on the Administer | User Management | Roles link, or navigate to admin/user/roles.

To assign rights to specific roles, click the edit permissions link next to each role, and scroll down to the options for the node module.