The Virtual Astronaut Learning Environment is a web-based three dimensional virtual world currently consisting of the International Space Station (ISS), to be broadened in the future to Lunar and Mars habitats. It is an entertaining and captivating vehicle to deliver NASA’s educational content, as well as showcase the ISS and the research conducted onboard. The intended audience is 5th – 8th grade students and their teachers, for use within or outside of the formal classroom setting. The learner becomes an astronaut onboard ISS, exploring the vehicle, discovering interactive educational activities on topics related to the challenges of living and working in space. By using this technology-based venue, the interactive nature, sense of exploration and discovery, and immediate feedback keeps learners involved, captivated, and inspired. This effort involves participants in the Vision for Space Exploration by providing a sense of the feeling of being aboard the ISS, and, in the near future, doing an Extravehicular Activity (EVA) aboard ISS, and later, exploring a Lunar and a Mars base. Additionally the learning environment is completely extensible, allowing for the addition of activities which teach about cutting edge NASA research and the challenges of long-term space travel.