Second language learning demands more efforts and practices in comparison to learn first language. It needs more tools, techniques and innovative ideas. Wiki provides such a way to teach that makes learning more interesting and fun.
In this video it is described that how can we use wiki? For that there is an example of four friends communicating using wiki.  In wiki a teacher can share knowledge for his students. Students can read and edit new information on their own. Anybody can edit and save the page. Teachers can use it as an assignment too. H/She can also paste some links for students to get more information about the topic.