We have different layouts that will help while grading. The first one could be seen in the "Progress" page of each assignment and by clicking on the top right button that says "Grade" (on blue).
And the second one, would be also found on the "Progress" page and by clicking on the top left button that says "Questions". This second display will be really helpful for open response questions.
Another useful feature you can use once adding a question, while editing a video, is the feedback tool. This will be seen by the students once the question is answered, therefore it is possible to show a hint of the correct answer to the students so they have an idea if they have answered right or not, this could also help you to remember the grading criteria of that specific question.