Mount Orange School (Moodle 2.5 demo)

While Mount Orange School is useful for seeing a real Moodle site in action with user data, if you'd rather try out an empty site, then the Moodle Sandbox allows you to explore features  with the role of admin as well as manager, teacher and student. It also runs the latest version of Moodle and is reset to its blank state every hour, on the hour.