The study of the human body and health related activities lend themselves nicely to the Internet. The Konnections examples here will offer more information, in the simplest, neatest way. Watch the blood flow to and from the heart. Spend some time learning about the brain and senses too. If you can get a book to do what these sites can do, I want to see it.
All science teachers can remember their greatest lessons and teaching experiences.
These science Konnections offer such a wide variety of information that it would be difficult to put them into just one category. Science teachers will find recent science news, information, and creative, interactive sites that will be invaluable. Remember when sharing with colleagues for a few moments before or after a teachers' meeting, was the only way to share, or gain new ideas. That has changed a bit. The Internet has helped teachers throughout the world share.