Second Life can be used as a knowledge medium in distance education. The author conducted a study using Second Life as a supplement in a problem-based blended learning master's program. Students participated in 25 scheduled online activities in Second Life over 5 weeks, including educational visits, discussions, and student creations. The outcomes showed Second Life provided a social and immersive environment but was still too time consuming. Future uses could improve with earlier planning, limiting activities, and qualifying student participation and discussions.