Edutagger is a social bookmarking service for K-12 learners and educators, allowing you to store your web links online and share them with others. Like Delicious, but targeted at educators. Share links with other professionals, or get the widget for your blog for people to bookmark your own posts.

Another interesting site is Smart.fm. It is like your online study partner. Create study guides to help you revise for the big test and share them with others, or browse through the public lists to increase your general knowledge. It is "a personal trainer for your head".

Sign up with The League of Scientists,  and find a collection of fun and educational Science games to test your knowledge. Build a circuit to power a robot, or manage your very own swarm of butterflies. More games coming soon.

iLearn have a link to a great site called Story Cove. After you register, (a quick and painless process), you have access to online stories that are told through short movies and come complete with teacher notes. All the stories are based on popular folk tales from around the world. A great resource for K-2.

Finally for today, Edu 2.0 is an online educational community tool that is similar to Moodle. With over 85,00 members, you can have a website packed with features and learning opportunities. They even have a demo site that you can play with and customize to get a feel for it.