Envision Schools: transforming the lives of kids from disadvantaged backgrounds
Make Use Of: index of websites important to geeks and tech aficiandos
CyberXtreme: a hacking forum / blog to find valuable information on privacy, security, hacking, programming, and digital life
Hack This Site: a free, safe, & legal training ground for hackers to test and expand their hacking skills. Forums on hacking, network security, etc.
Hack in the Box: another hacking site worth checking out
Hackaday: modifying technology, or "hacking" is a great educational and fun pasttime. This blog is great for ideas on modding your life and working with classes on computers and other electronic devices to make useful things from discarded stuff and learn about electronics, etc.
Here are some great (and alarming) web tools for students to use
Michael Wesch's blog