Using social networking can be a great way to connect with your students to share assignments, resources, and even reminders of due dates and upcoming tests. However it's not quite as simple as "friending" students on your personal accounts. (Which is not a good idea.)
Facebook - Online social network.
How to Set Up a Class Facebook Page (Slideshare)
Examples of RPS classroom Facebook pages:
Twitter - Microblogging service that enables users to send and read "tweets", which are short posts limited to 140 characters. Also provides the ability to embed photos, videos, and links along with hashtags to find Tweets about the same topic.
Vine - Website that allows its users to create and post short video clips.
Vine, or how I learned to love history in 6 seconds. (Blog post with tips on using Vine in the classroom.)
Six Tips for Making an Awesome Vine Video (Videomaker.com)
20 Ways To Use Vine in Education (Innovation Design in Education)
Pinterest - Pinterest is a pinboard-style photo-sharing website that allows users to create and manage theme-based image collections.
16 Ways Educators Use Pinterest (Infographic)
The History Lab (Pinterest Boards broken down by era.)
Instagram - Online photo-sharing, video-sharing and social networking service that enables its users to take pictures and videos, apply digital filters to them, and share them on a variety of social networking services.
Instagram in the Classroom (Collection of Infographics and other links collected on a Pinterest board.)
Foursquare - Location-based social networking website for mobile devices, such as smartphones.
Google+ - Social networking site.
Bitstrips - Instant comics starring you and your friends.
Make Your Own Comic Strip: Using Bitstrips For Projects or Assignments (The Chronicle of Higher Education)