This document discusses using virtual worlds to teach English. It notes that virtual worlds allow students and teachers to be anywhere and learn through experience. However, many teachers recreate traditional classrooms instead of taking advantage of the virtual world's possibilities. The document recommends using games and quests to motivate students by fulfilling their desires to make friends, communicate, personalize their avatar, and feel powerful. It provides examples of complex adventure tasks and assessments that have been created in virtual worlds for English learning. Finally, it discusses which virtual worlds may be best and considerations for the future of virtual world-based education.