TappedIn is a free, interesting site for educators that describes itself as "the online workplace of an international community of education professionals. K-12 teachers and librarians, professional development staff, teacher education faculty and students, and researchers engage in professional development programs and informal collaborative activities with colleagues." It is a web-based learning environment and professional learning community for educators.
TappedIn is organized in virtual buildings for each topic and area and each building includes public, group and personal "rooms" for educators to use. Users can create their own groups and communicate via chat, private messaging, and discussion boards. Student accounts are also available.
Educators from around the world participate in TappedIn and collaborate with each other. Educators can plan and conduct learning projects, participate and lead discussions, attend online courses, mentor other educators and get feedback on lesson ideas.
There are hundreds of groups and rooms in different educational topic areas. There are places to upload files, share links, and a whiteboard to write notes.
It's an excellent resource for educators.