Wikis can be an incredible supplement to an online class. They can be used to organize class material, collect student assignments, or act as a collective consciousness. Wikis in Education from Wetpaint is now offering add-free wikis for classrooms. Here's how they describe what their wikis can do:

"With the current generation of students being more technologically savvy than ever before, digital space has become a viable and important tool for educators. Wikis supply digital publication without needing to have knowledge of coding or private server space. In other words, incredibly easily published web space."

Check it out to make your own or see examples of educational wikis in action.