As a Student, I do not belong to any teacher networks. However having done some research this is where i do find the most help. I almost always use the Google + networks that i have joined into via the Arcadia page or the connected learning page, and I almost always use twitter contacts as well . I also subscribe to the international Reading association and the website Edutopia. I am constantly reading different articles on the site as well as looking for my next idea. I also read some articles in the NY Times, and in the Philadelphia Inquire.
Enjoy your evening