A wiki is a webpage or set of webpages that can be easily edited by anyone who is allowed access (Ebersbach et al., 2006). In an educational context, wikis have an extremely practical role to play in allowing students and teachers to quickly and easily explore an area of knowledge, developing only as much structure as they need along the way. By placing structure at the service of content, groups of people have freedom to build on each other’s work and build up resources in a genuinely collaborative way.