Wiki

I really do NOT like wikispaces. It was NOT user-friendly and the functionality of it, I really don't like. My district asks us to use Edmodo which offers a "Facebook-esque" quality that all of my students are use to and makes it supremely easy to communicate with my students about upcoming projects and past assignments/notes with a feature to send notifications by a secure third party in either an email or text message. As for the collaboration feature which wikispaces laud, you can gain the same functionality through Google Drive (which offers the ability to collaborate on Google's PowerPoint presentations, Word Documents, Spreadsheets, etc.).