Here we outline what can be done with a post:

Anatomy of a post

The a post and it's replies are in the red box.

When you hover over a post you will see  3 blue boxes in the upper right corner of the post. 

• The X is to delete a post - Teachers can delete any of their posts for groups they own or students posts, st iconudents can only delete their post
• The pencil icon is to edit a post - Teachers can edit any of theirs or students posts.  Students can only edit their posts.
• The pop-out icon pops a window out of the browser for just that post and it's replies.  Makes it easier to print if needed, but we frown upon wasting dead trees :)

Underneath the post you will see  reply, public, and tag links.a

• Reply link - this is how you are your students reply to a post.  In Edmodo 3.0 the replies are now directly under the original post for easier management.
• Public link - When you click this link it sends the post to the groups public timeline, if you click the pencil icon in the left sidebar next to the group, you will see a public link that takes you to the public timeline.  Every post is private by default and only teachers have the option to make a post public.
• Tag link - click this to create tags for posts so you can sort them easily later.  Tags are unique to each user and do not propagate down to other users.