This document discusses wikis and their educational uses. It begins by defining wikis as websites that allow collaborative editing without technical skills. Wikis allow asynchronous communication, group collaboration, and presentation of information in various formats. They have revision history and meet technology standards. Challenges include privacy, reluctance to post, and information accuracy. Wikis can be used as products that are referenced or as processes where users collaborate dynamically. Examples of educational wiki uses are provided, along with tips for engaging students in wiki collaboration and important wiki features.