Grading Tool gives you an overview of student submissions for an assignment.
Click the assignments link in course navigation.
The sidebar will show you how many submissions have been submitted and graded, if any [1].
Click the Grading Tool link [2].
Click the drop-down menu to open the list of students.
For easy identification, each student is identified with a assignment submission status next to his or her name:
Note: When you Hover over to the student name it indicates the status of that student.