I have course that has hundreds of students every month & for a requirement they need to make 3 posts on each discussion board. Is there a way to automate a score in the grade book when they post 3 times on the discussion board for that Module?
There is no grading automation for the Discussions tool. You could create a one question quiz and set the release condition for that to discussion posts/replies. The student would then only see the quiz once they have done the required posting.