This site is really a conversation among your classmates! You can comment on posts made by others, and then can comment on your posts. It is an interactive conversation. Commenting on a post is pretty straightforward:

Type your brief response in the comment box, below where it says “Leave a Reply.” Then, click Post Comment.

If you don’t see a comment box at the bottom of the post, look for “Leave a Comment” at the end of the post. This link will bring you to the comment box.