In the previous chapters, you worked with Moodle's standard modules. For example, assignments, forums, glossaries, lessons, quizzes, surveys, and other course features are all made possible by modules. These standard modules are installed with Moodle. You can also install modules that you get from the official http://www.moodle.org/ site, and from other sites. We'll cover adding new modules in this chapter. We'll also cover duplicating courses on your site, and importing course material from other Moodle sites. Finally, we'll take a look at how Moodle uses roles to determine who can do what on your site.