Offers a fun, painless, and informative introduction to the internet. Developed by Public TV in Troy, New York. A good one for students, but teachers can get a lot of ideas here, too. Recently featured in NEA Today, lives up to its reputation for hands on interactive learning. Should challenge upper grade students.
Some pages load slowly on modem connections.
Lots of ideas and links to web resources, useful to both teachers and students. One of my personal favorites. A rich, authoritative source of interactive material on a wide variety of topics. Even if you don't use the books, the lessons and activities might be useful. For a subscription fee, this site offers K-8 student and teacher curriculum resources, high quality and effective.