I teach at a couple of online schools and the discussion forum can get hard for me. Many students don't know how to post responses to the questions. When they respond to my posts or classmates, it is even worse. They think that "you did a good job" or "I liked your post" are okay to put. I even correct the students by sending out directions on what makes a post substantive to all students in the class. Sometimes this helps, sometimes it doesn't. What are some tips you can give to get students to post correctly in the forum?