The US Marines issued an order Monday that bans social media sites including Twitter, Facebook and MySpace on its network.

The sites increase the risk of sensitive information leaking out to adversaries, the order explains.

Read the full article here: US Marines Banned From Social Media Sites.

Twitter can feel like a strange new landscape when you first jump in. It is not always clear what its professional uses are, or what to post in 140 characters or less. But when you start to think of Twitter as a micro-blog (and not just a forum for the personal minutiae of people’s daily lives), you will find that Twitter can be a valuable tool for professional development. Here are 25 ways that teachers can use Twitter to ask for help, get lesson plan ideas, book and professional resource recommendations, connect with other professionals, and even host an online book club.

via 25 ways to teach with Twitter by Sonja Cole.

With so many students, teachers, and librarians on Facebook these days, the social media site has become somewhat of a platform, offering developers a way to create and share applications for education. This, of course, is great news for online education, as it provides all sorts of great tools designed to make learning and administration easier. Check out these applications that represent some of the ideal tools Facebook has to offer for online education.

via The Facebook Classroom: 25 Facebook Apps That Are Perfect for Online Education – College Degree.com.