Did you know...
When you set up your discussion boards, do you indicate that your students must post before seeing replies? This is a great feature from Canvas. However, students have learned they can enter a blank post, see replies then go back and edit their post.
In order to circumvent this process you can:
Go to settings, Course Details (first tab), choose more options (about 1/2 way down on the page), uncheck the option that allows the student to edit replies.
However, this means if the student has a typo and catches it, they can not edit it before grading.