I'm not sure if CLRN is living up to its potential, but this website has links to many electronic resources, electronic textbooks, media reviews, and other information for educators. It is worth checking out!
Learn more about Twitter-talk here. Wondering about the @, #, and retweeting? This page explains it in an entertaining way. It's called Twitter for Dummies part 4. There are other parts as well.
A nice geography map game where you need to click as near to a given town or city as possible. Build up a high score by being accurate and fast. Click 'Visit' on the homepage to play without signing up. Play by yourself or with others online.