I get a fair amount of questions from instructors about how to delete students’ submissions. That’s often prompted by a student’s upload mistake or an instructor granting a “re-do.” You can prevent the mild headache of this, if you want, by just allowing multiple submissions in the first place.To allow for some “whoopsies” or a second attempt on an assignment, go to your Lessons content area and edit the settings. Scroll down to “GRADING” and click on “Submission Details.”
Change the number of attempts to either unlimited or multiple (multiple requires that you enter a number). The “score attempts using” drop-down determines which of your grade entries goes into the gradebook — the last try, the first, the highest, the lowest or an average.
Please note: If you have multiple submissions, do not give one of them a zero without expecting it to negatively affect the student’s final grade. Just ignore the “whoopsie” attempt, or clear it from the submission history by following the directions here: http://bit.ly/deleteattempts.