If you want to grade assignments without knowing who submitted them, you can hide student names in Grading Tool .
Click the Grading Tool link .
Click the Settings icon [1]. In the settings drop-down menu, select the Options link [2]..
Click the checkbox next to Hide student names in the Grading Tool to hide the student names.
Click the Save Settings button.
View the student drop-down menu and verify that all student names are hidden. You can also hide student names in the Gradebook.