This document lists various online learning resources and discusses teaching online. It mentions 12 sites for online learning including Khan Academy, NASA for Educators, and Lynda.com. It also provides helpful hints for teaching online through 27 short videos by Dr. Curt Bonk. Additionally, it discusses using virtual field trips as an alternative to physical field trips when budgets are limited, and mentions the Center for Interactive Learning and Collaboration as a resource. Finally, it describes immersive environments as artificial, interactive, computer-created worlds that can model reality or be fantasy interfaces, providing examples like Atlantis Remixed and The Sims3.