Twitter  also works as a powerful way to build a personal learning network. In education sector Twitter  helps to collaborate, share best practices and explore resources. Weekly “chats” on Twitter brings an environment  by connecting globally and discussing any complex topics.Twitter is a no cost social interaction platform  building a  network  of people globally with similar interests  to interact and share ideas/views resulting as  an opportunity for personal development  and encourages to participate in a variety of skill  and knowledge developing medium. 

Reference:

http://blog.hootsuite.com/team-collaboration/

http://net.educause.edu/ir/library/pdf/ELI3020.pdf

http://en.wikipedia.org/wiki/Collaboration