Ollie Bray DHT at Musselburgh grammar, currently seconded to LTS as elearning guru has an article in the TESS. Ollie recently came second in the Worldwide Innovative Teachers Awards in Brazil. He is a UK winner as well.
He (as are many of us) is concerned about local authorities/network companies blocking sites.
He also has another article on social media in the same edition of TESS here
Do go read them !