Teachers can use these tools in harmony with the goals for the class while exploiting the nature of MOO as a student-centered learning environment. Most MOOs are not designed with specific academic purposes in mind, and some are simply not appropriate for young people. The following successful educational MOOs, however, are suitable for learners of high school age and older. Those who first connect to a MOO are called guests. Permanent characters can name themselves, describe themselves, and set their gender.
Users come to know one another, forming friendships and a sense of community.
These relationships can be one of the most rewarding aspects of the MOO experience. Builders are users that have programming permissions for creating rooms, exits, and objects which they can describe in any way that is consistent with the MOO's theme. Those who learn the MOO programming language can become programmers who create more elaborate features such as Gregor's monkey. The wizards are at the top of the hierarchy. They create new characters, monitor connections, teach new users, and deal with problems, often with the help of teacher-administrators.