Why use it?
If, for some reason, there is a change in the submission deadline, you can change the original dates by editing the assignment. However, if you need to extend the deadline for individual students, there is a different method.
How to grant an extension for an Assignment activity?
This will not work if ‘anonymous submissions’ is in use and the usual Teacher Teacher/Editor) role.
Grant an extension on individual basis
Click the assignment and select View/grade all submissions. (You can do this regardless of whether there have been any submissions).
Select the student or students to whom you want to grant an extension.
Scroll down to the end of the page, select Grant extension from the With selected drop down and Go.
Choose a new Extension due date and Save changes.
Grant an extension for groups
It is possible to create Group overrides and allow one or several students to have their own agreed extension when setting up the original assignment. When you are in the assignment settings select Group overrides from the Administration block on the left hand side. You can then select a group and the group deadline.