Great list of different educational networks in many different formats, including diigo, Linked In, Facebook, nings, wikis, and more. Some are by discipline
Interesting list-- includes educators from many different walks, including some in specific disciplines. Click on a name to learn how to connect with them.
Kathy's Picks includes the link to sign up for her weekly newsletter. If you're not familiar with it, it has a wealth of websites and resources for every discipline.
List of resources curated by a superintendent, with input from others. Includes explanatory flash cards and a variety of categories to include many disciplines.10-2-17