Knowing the right hashtags can be like knowing a secret password that lets you explore other people's PLNs, while also getting your own content out and in front of some extra eyeballs. I'd never heard of most of these teacher-related hashtags so these should be a useful way to expand a PLN.

This is a page that a teacher used to map out his own personal PLN. It's apparent why he named his site "Shambles" and I'm always a bit wary of any self-professed "gurus" but the fact that this guy took the time and effort to map out his full digital footprint and then publicly share it is pretty incredible. His network includes most of the usual suspects as well as a lot of resources and sites that I've never heard of. There's even an entire subsection based entirely around Second Life.

As a teacher of English to non-natives I was curious to see if there were any existing social networks for language learners. I found this one, called KanTalk, that uses Skype to allow people to connect and practice their English. Users can select a topic and they will be directed to a page with a relevant video clip from YouTube, a few discussion questions, a short reading text and a few vocabulary words. When they are ready to practice speaking, they can choose a partner from a list of registered users and invite them to chat on Skype. If the partner accepts, the two can then use the discussion questions as prompts for a conversation. The users can also record themselves speaking and listen to/comment on other learners recordings. Learners can form and join groups based on interests, culture, exams or any other criteria they choose. KanTalk seems to be a clever way to add a social network framework to an existing technology for educational purposes