Wiki's are an excellent way to bring real collaboration to your classroom for homework and long-term projects. It is well documented that children benefit from group work, and this is just another way to bring group work to the students learning.
It is also a great way to put class summaries (what we did today, what you have to do for homework) so children can get caught up easily if they miss a day of class.
I would use a wiki in my classroom, as I plan to teach 5th grade. At that grade, they will be familiar enough to know how to visit a webpage and have basic typing skills. That's really all that's needed for a wiki.
