The workflow is interrupted by the size and features of the window. The left side menu with all of the students is longer than the size of the doc window. The amount of scrolling up and down not only to progress through the student's work but then to select the next student is cumbersome. In my screen shot, you can see I click on the student name but the bottom of the doc is barely visible. I think a smaller student names menu, and enlarged work space would help and the ability to pass to the next student at the top would make the work flow go smoother.
Grading Window Layout Using Google Integration