Section 1. MUVE in science education and language learning. Chapter 1. EcoMUVE: a case study on the affordances of muves in ecosystem science education ; Chapter 2. Designing for collaborative play: why games need MUVEs and MUVEs need games ; Chapter 3. Task-based language learning and learner autonomy in 3D virtual worlds ; Chapter 4. Contextualizing language learning with street view panoramas ; Chapter 5. The affordances of 3D virtual learning environments: designing for learners' interpersonal and emotional connections -- Section 2. MUVE and twenty-first century learning. Chapter 6. Integrating virtual spaces: connecting affordances of 3D virtual learning environments to design for twenty-first century learning ; Chapter 7. Creating contexts for collaborative learning in a 3D virtual world for distance education ; Chapter 8. Team-based learning and team-based playing: how world of warcraft and similar games can make better learners ; Chapter 9. Factors affecting primary school students' learning experiences when using muves: development and validation of a scale -- Section 3. MUVE: exploring the future. Chapter 10. Multi-user mixed reality environments for distance learning ; Chapter 11. The learners' isle: a multi-user virtual environment to foster learner agency and motivation ; Chapter 12. The added value of the hybrid virtual learning approach: using virtual environments in the real classroom ; Chapter 13. Create-and-learn: education "in" a synthetic learning environment.