Online Schoolbook "GOLD DUST"
According to Connexions, "GOLD DUST is the first interdisciplinary digital textbook that works on the basis of the "Papillon" educational concept - a new building block for learning in the networked world. The completely new self-learning method is a combination of grand adventure, multimedia effects and global learning. By linking the book with the Internet, teaching books are transformed into a huge dynamic ecosystem of knowledge and allows children to see our world in a global context. They acquire the key skill networked thinking and learn on the latest state of knowledge."
The site is from Germany, and available in a number of languagesd, including English.