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So once again I am pulling from David Kuropatwa's archived material. This post was made on Monday, April 13, 2009, and is titled "My Class Blogs-Part 5". As part of the preparation for his calculus student's final exam, David has them create a Wiki Solutions Manual.
Each student is instructed to make two edits to the wiki. The first edit is a "contribution", in which they have to solve, write out and annotate one of the problems. They are instructed to write clear and well defined so that interested persons can learn from the problem. The second edit they are to make is a "construction", in which they edit someone else's work. This can be an error correction, a re-organization, or just adding some sort of color. They are encouraged to be creative. The result is a wiki that becomes a "collaborative solutions manual!"

I think this is a great idea, where the students share their work and can learn from one another. I was thinking that this may be a good idea for a 5th or 6th grade class to do as a way to help each other on their homework and mentor one another. It could serve as a form of tutoring. It also would not have to be just math. Student's could post ideas and suggestions in regard to other types of homework as well. It certainly is something worth thinking about, especially in terms of incorporating technology into the classroom.