Both wikis and thread discussions extend the classroom beyond its current limits and boundaries. They are visible to all users and provide students with opportunities to collaborate and elaborate on topics in an asynchronous manner. In threaded discussions, participants access discussion forum, post messages, and reply to the messages of others. However a wiki takes it a step further since students have the opportunity to add to, change, and even delete someone else’s contribution. In other words, wikis allow for collaborative editing.
A challenge that may arise from using wikis is the possibility of ending up with a “mess” because everyone is putting in data and many times no one stops to edit and delete information no longer necessary or accurate or updated when changed.