There are four basic types of forums that can be used for instructor and student collaboration on a course site. A standard forum allows anyone to start new topics at any time and is generally the most flexible. A Q&A forum has students post questions and only see other replies after posting their own answer. The other two types restrict students to only one discussion post each or consolidate all replies to a single topic on one page. Instructors can choose whether forums are graded by just themselves or involve peer assessment as well.