Twitter is an online application that is part blog, part social networking site, and part mobile phone/instant messaging tool. It is designed to let users describe what they are doing or thinking at any given moment in 140 characters or less. As a tool for students and faculty, Twitter could be used academically to foster interaction and support metacognition. Sadly however, there are a few access problems although the RNIB have joined the Twitter scene but the good news is that you can now use a different version called Accessible Twitter.