There are a couple reasons you might want to create a folder from an assignment. Creating a folder allows you to:
Review missed questions from the assignment with students.
Save the assignment to be edited and used year over year.
To begin, click into the desired class and navigate to the Assignments sub-tab.
To create your folder, follow these steps:
Find the assignment you wish to create into a folder
Click Actions
Select Save Questions to Folder
Choose to add questions to an existing folder or create a new folder
Navigate to the Folders tab to view, edit, share or assign your folder