Students do not automatically know the vocabulary of the discussion area. It is worthwhile to educate students about the vocabulary and to provide some practice in using the tools correctly. A little language explaining how to start a thread and how to reply to a thread will make the responses much easier to read and to grade. A thread is one topic and new threads are equivalent to changing the conversation in face-to-face communication. In normal conversation, we have subtle and obvious cues to help us understand these changes - in a discussion forum, the only available cue is the location of threads and replies.
Example 1 The discussion board is an area that houses forums. It is in these forums that you will post for credit on the discussion board. A thread is the initial post to the forum and all associated replies to that post. Threads can be thought of as a single topic in a conversation. If you create a new thread, you are changing the topic of the conversation. Sometimes I will require you to post a new thread so I can read and grade individually. At other times, I expect you to reply to a thread started by one of your classmates. You need to learn the difference quickly to be successful in this course.