One of the social networking tools that I have used is creating a playlist on Youtube which:
1. helps me upload videos for others to watch which are subject and topic specific for a particular examining board.
2.   The is useful for my teaching and students as it means I don't have to keep on searching for useful videos each time to use in my lessons. It also allows me to send my list to my students and direct them to specific ones to watch that are beneficial. It means they can use it for revising, updating their notes, visualise the processes and try and understand the concepts. The videos are so varied that it is suitable for all learners. Some include the animated drawings whilst its been narrated. The play lists can be hyperlinked to my SoW and is accessible for teaching sets and it can be shared easily by going to my channel and send it to students. Its easy to use, students don't need any login name or password. It also encourages peer assessments and peer reviews which allows comments to be recorded about the video

3.   The issue is that it attracts ''trolls'' - people who write obscenities in the comments box