When you assign an assignment to students you can choose to give the same due date to all students, or a different due date to different groups of students. To begin, navigate to the assignment you wish to have separate due dates for and select edit.
Scroll to the bottom where the assign to section is located.
Select the student(s) that you want to assign the assignment to, add the due date and click save.
To add a separate due date for a different group of students click the add button, enter the students or section, add the due date, and click the save button.
Immediately after saving, you'll see the different due dates at the bottom of the assignment.