"Increasingly, educators are acknowledging and welcoming the relative advantages of social media into the teaching and learning process. From creating school Facebook pages to connecting students with experts via Twitter, social media has taken root as a legitimate classroom learning and communication tool. The highly linguistic nature of social media allows us to create and consume ideas and information unlike ever before. Much attention has been given to composing an articulate blog post and condensing our messages to 140 characters or less. However, effective use of this 21st century technology requires that we not only become proficient in textual communication, but also in our ability to express ourselves and interpret others' ideas through visual literacy."
Via John Evans