Online discussion boards allow students to participate in course discussions w/ fellow class members.  There is a forum for each question in which you are required to respond & reply to other students.  For each forum you are to make at least two separate entries in the discussion board, at different times.  It is suggested that you respond at least once to the discussion question, & at least once to another user by the noon of the due date for each unit (see the Course Outline & Review Notes List from the External Links tab). Students are always concerned w/ 'how much... how long should my answer be?'  About 100 words should be good for each of your two entries should be enough.