It would be very helpful if discussion forum posts could be darker around the edges to show a distinction of the post as well as the reply to a post being more indented.  It would also be helpful if there was more space between the replies, because it can be difficult for users to separate the discussions in their mind to know which post they are in fact responding to.  A student mentioned having a hard time separating out which post is separated, and I can see how it could be hard for someone with eye problems as well.  If students could "name" their reply to the original post that would be great, as a way to mimic the thread style forums.