Twitter is one of the best Web 2.0 tools available right now in regards for students increasing their knowledge in particular fields. Twitter can be found here. Twitter allows people of all backgrounds, worldviews, and langages to connect in a way that is easy and very practical. It is available for use both on computers, and on practically all mobile devices. There is also no age limit to sign up for Twitter, but in regards to internet safety, the teachers disgression in regards to using this Web 2.0 tool should be used.